Atmospheric Pressure Answers
What are the units of measurement for atmospheric pressure, and which is easiest to use?
Q. What are the units of measurement for atmospheric pressure? Which do you think is easiest to use? Explain why.
Asked by HI - Fri May 23 20:10:33 2008 - Weather - 4 Answers - Comments
A. 1 atm torr psi pascal atm is by far the easiest to use because it requires less conversion 1 atm = 760 torr but the SI unit for atmospheric pressure is pascal so if u need that there u go
Answered by odisho68 - Fri May 23 20:14:30 2008
Q. What are the units of measurement for atmospheric pressure? Which do you think is easiest to use? Explain why.
Asked by HI - Fri May 23 20:10:33 2008 - Weather - 4 Answers - Comments
A. 1 atm torr psi pascal atm is by far the easiest to use because it requires less conversion 1 atm = 760 torr but the SI unit for atmospheric pressure is pascal so if u need that there u go
Answered by odisho68 - Fri May 23 20:14:30 2008
Does atmospheric pressure have to be overcome when moving away from the earth?
Q. We all know that when you jump up away from the earth, you are overcoming the force of gravity while you are in contact with the earth. However, when you jump, do you also have to overcome the force of the atmosphere pushing down on top of you? I am also told that the reason we are not crushed under the force of the atmosphere is that the gases inside our body push out against the atmospheric pressure with equal force. If this is the same reason we do not have to overcome the atmosphere, then what about objects not filled with gas, such as a solid ball?
Asked by Anthony C - Mon Oct 25 22:43:21 2010 - Physics - 2 Answers - Comments
A. In fact, if anything, air pressure helps us jump away from the Earth. How... by providing some buoyancy, a lifting force in opposition to the force of gravity. It's from buoyancy that balloons, for example, can float in the air. All objects in the air incur some buoyancy. The difference between floating and not floating, though, is if the buoyancy B exceeds or equals the weight W of the body. For thee and me, that won't happen because our weights are greater than the buoyancy we can generate. Even so, because of the bit of buoyancy we do have, our net weight is w = W - B < W. That is, our net weight is less than our weight without the buoyancy from the air pressure. As our net weights are less than our raw weight W = mg, we don't need… [cont.]
Answered by oldprof - Mon Oct 25 22:53:34 2010
Q. We all know that when you jump up away from the earth, you are overcoming the force of gravity while you are in contact with the earth. However, when you jump, do you also have to overcome the force of the atmosphere pushing down on top of you? I am also told that the reason we are not crushed under the force of the atmosphere is that the gases inside our body push out against the atmospheric pressure with equal force. If this is the same reason we do not have to overcome the atmosphere, then what about objects not filled with gas, such as a solid ball?
Asked by Anthony C - Mon Oct 25 22:43:21 2010 - Physics - 2 Answers - Comments
A. In fact, if anything, air pressure helps us jump away from the Earth. How... by providing some buoyancy, a lifting force in opposition to the force of gravity. It's from buoyancy that balloons, for example, can float in the air. All objects in the air incur some buoyancy. The difference between floating and not floating, though, is if the buoyancy B exceeds or equals the weight W of the body. For thee and me, that won't happen because our weights are greater than the buoyancy we can generate. Even so, because of the bit of buoyancy we do have, our net weight is w = W - B < W. That is, our net weight is less than our weight without the buoyancy from the air pressure. As our net weights are less than our raw weight W = mg, we don't need… [cont.]
Answered by oldprof - Mon Oct 25 22:53:34 2010
What happens to observed boiling points of the unknowns with a decrease in atmospheric pressure?
Q. If a storm system moves in and the atmospheric pressure drops, will the observed boiling points of the unknowns increase, decrease, or stay the same??? I am thinking decrease but I am not sure?
Asked by mayday - Wed May 26 00:04:58 2010 - Chemistry - 1 Answers - Comments
Q. If a storm system moves in and the atmospheric pressure drops, will the observed boiling points of the unknowns increase, decrease, or stay the same??? I am thinking decrease but I am not sure?
Asked by mayday - Wed May 26 00:04:58 2010 - Chemistry - 1 Answers - Comments
Chemistry - How is heat of vaporization related to atmospheric pressure?
Q. How is heat of vaporization related to atmospheric pressure?
Asked by ct1 - Thu Apr 3 17:07:48 2008 - Chemistry - 1 Answers - Comments
A. A decrease or increase in atmospheric pressure will decrease or increase the boiling point and vaporisation rate respectively. A Lower pressure will decrease the boiling point making it easier for the molecules of vapour to enter the atmosphere...and the opposite for a pressure increase. (Pressure Increase Boiling temperature increases and vaporisation rate decreases (more heat energy required), and vice versa.
Answered by Norrie - Thu Apr 3 17:24:51 2008
Q. How is heat of vaporization related to atmospheric pressure?
Asked by ct1 - Thu Apr 3 17:07:48 2008 - Chemistry - 1 Answers - Comments
A. A decrease or increase in atmospheric pressure will decrease or increase the boiling point and vaporisation rate respectively. A Lower pressure will decrease the boiling point making it easier for the molecules of vapour to enter the atmosphere...and the opposite for a pressure increase. (Pressure Increase Boiling temperature increases and vaporisation rate decreases (more heat energy required), and vice versa.
Answered by Norrie - Thu Apr 3 17:24:51 2008
How do you figure out atmospheric pressure?
Q. I am very confused. If atmospheric pressure is 745mm HG, what is atmospheric pressure in mm H2O? Does mercury have anything to do with this? Mercury is 13.5g/m L
Asked by Batmen - Thu Feb 19 15:37:12 2009 - Chemistry - 1 Answers - Comments
A. 13.5 x 745 = 10057.5mm H2O Atmospheric pressure is meassured with a liquid and any liquid will do but to get the instrument in a resonable size a heavy liquid like mercury is used heck they could have used water or vodka if they prefered even milk could be used but it keeps things small using a heavy liquid. therefore mercury.
Answered by Mr.K - Thu Feb 19 15:47:00 2009
Q. I am very confused. If atmospheric pressure is 745mm HG, what is atmospheric pressure in mm H2O? Does mercury have anything to do with this? Mercury is 13.5g/m L
Asked by Batmen - Thu Feb 19 15:37:12 2009 - Chemistry - 1 Answers - Comments
A. 13.5 x 745 = 10057.5mm H2O Atmospheric pressure is meassured with a liquid and any liquid will do but to get the instrument in a resonable size a heavy liquid like mercury is used heck they could have used water or vodka if they prefered even milk could be used but it keeps things small using a heavy liquid. therefore mercury.
Answered by Mr.K - Thu Feb 19 15:47:00 2009
Atmospheric pressure?
Q. How does the atmospheric pressure affect the boiling point of a liquid? How does the atmospheric pressure affect the melting point of a liquid? please help!!!
Asked by Me<3JB - Sun May 11 18:14:01 2008 - Chemistry - 1 Answers - Comments
A. it affects the boiling point (that is why some foods have high altitude directions) Melting point is not affected by atmospheric pressure
Answered by Michael P - Sun May 11 18:20:28 2008
Q. How does the atmospheric pressure affect the boiling point of a liquid? How does the atmospheric pressure affect the melting point of a liquid? please help!!!
Asked by Me<3JB - Sun May 11 18:14:01 2008 - Chemistry - 1 Answers - Comments
A. it affects the boiling point (that is why some foods have high altitude directions) Melting point is not affected by atmospheric pressure
Answered by Michael P - Sun May 11 18:20:28 2008
How do you find thr atmospheric pressure if your given the boiling point?
Q. How do you find thr atmospheric pressure in mm Hg if your only given a boiling point? Is there a certain formula that I need to follow?
Asked by mafalda - Sun Sep 6 13:57:46 2009 - Physics - 2 Answers - Comments
A. I'll assume you mean boiling point of water, but if I'm wrong, this method would still apply. ln(P/Po) = (DHvap/R)(1/To - 1/T) DHvap = enthalpy of vaporization (for water it's 40.7 k J/mol) R = 8.314 J/mol-K P, Po, T, To are vapor pressures at respective temperatures At 760 mm Hg, the boiling point of water is 373K. ln(P/760) = (40700/8.314)(1/373 - 1/T) T could be the boiling point of water at some other elevation or some other place with a different atmospheric pressure. P would be that different atmospheric pressure.
Answered by snow yak - Mon Sep 7 00:21:37 2009
Q. How do you find thr atmospheric pressure in mm Hg if your only given a boiling point? Is there a certain formula that I need to follow?
Asked by mafalda - Sun Sep 6 13:57:46 2009 - Physics - 2 Answers - Comments
A. I'll assume you mean boiling point of water, but if I'm wrong, this method would still apply. ln(P/Po) = (DHvap/R)(1/To - 1/T) DHvap = enthalpy of vaporization (for water it's 40.7 k J/mol) R = 8.314 J/mol-K P, Po, T, To are vapor pressures at respective temperatures At 760 mm Hg, the boiling point of water is 373K. ln(P/760) = (40700/8.314)(1/373 - 1/T) T could be the boiling point of water at some other elevation or some other place with a different atmospheric pressure. P would be that different atmospheric pressure.
Answered by snow yak - Mon Sep 7 00:21:37 2009
How do I find the atmospheric pressure?
Q. The height h above sea level (in meters) is related to air temperature t (in degrees Celsius), the atmospheric pressure p (in centimeters of mercury at height h), and the atmospheric pressure c at sea level by the formula. h = (30t+8000) ln( c/p ) A mountain is 8700 meters high. What is the atmospheric pressure at the top of the mountain on a day when the temperature is -35deg C and the atmospheric pressure at sea level is 73 centimeters? (Round your answer to one decimal place.)
Asked by Anthony G - Wed Nov 19 23:06:52 2008 - Mathematics - 1 Answers - Comments
A. I didnt math my final year of highschool
Answered by yankees2632 - Wed Nov 19 23:14:01 2008
Q. The height h above sea level (in meters) is related to air temperature t (in degrees Celsius), the atmospheric pressure p (in centimeters of mercury at height h), and the atmospheric pressure c at sea level by the formula. h = (30t+8000) ln( c/p ) A mountain is 8700 meters high. What is the atmospheric pressure at the top of the mountain on a day when the temperature is -35deg C and the atmospheric pressure at sea level is 73 centimeters? (Round your answer to one decimal place.)
Asked by Anthony G - Wed Nov 19 23:06:52 2008 - Mathematics - 1 Answers - Comments
A. I didnt math my final year of highschool
Answered by yankees2632 - Wed Nov 19 23:14:01 2008
What is the atmospheric pressure in k Pa if a mercury barometer reads 748 torr?
Q. What is the atmospheric pressure in k Pa if a mercury barometer reads 748 torr?
Asked by LA Student - Wed Jul 20 19:51:15 2011 - Chemistry - 1 Answers - Comments
A. 748 torr times (101.325 k Pa / 760 torr) = 99.7 k Pa (to three sig figs)
Answered by ChemTeam - Wed Jul 20 19:53:21 2011
Q. What is the atmospheric pressure in k Pa if a mercury barometer reads 748 torr?
Asked by LA Student - Wed Jul 20 19:51:15 2011 - Chemistry - 1 Answers - Comments
A. 748 torr times (101.325 k Pa / 760 torr) = 99.7 k Pa (to three sig figs)
Answered by ChemTeam - Wed Jul 20 19:53:21 2011
what is the relation between mean sea level and the atmospheric pressure? How can i relate with a formulae?
Q. And is it possible to calculate the atmospheric pressure (abs) for any place in the world with mean sea level?
Asked by andavar a - Mon Apr 12 02:51:19 2010 - Physics - 1 Answers - Comments
A. Well a barometer is used to measure the atm pressure at any place. Now as we know that the density of atmosphere decreases as we move "up" that is "away from" the earth, so in other words the atm pressure is max at (mean) sea level. The decrease in atm pressure is abt 115 hpa per km rise. Now when we take a reading from the barometer, we apply various corrections like index error n height correction. This ht correction is applied to the barometer reading (that is basically the correction for the height of the barometer, which is "above" a certain ht from the sea level) to get the atm pressure at the sea level at that particular place. Well as for the formula between sea level n atm pressure, the normal… [cont.]
Answered by Pro bono publico - Mon Apr 12 03:20:41 2010
Q. And is it possible to calculate the atmospheric pressure (abs) for any place in the world with mean sea level?
Asked by andavar a - Mon Apr 12 02:51:19 2010 - Physics - 1 Answers - Comments
A. Well a barometer is used to measure the atm pressure at any place. Now as we know that the density of atmosphere decreases as we move "up" that is "away from" the earth, so in other words the atm pressure is max at (mean) sea level. The decrease in atm pressure is abt 115 hpa per km rise. Now when we take a reading from the barometer, we apply various corrections like index error n height correction. This ht correction is applied to the barometer reading (that is basically the correction for the height of the barometer, which is "above" a certain ht from the sea level) to get the atm pressure at the sea level at that particular place. Well as for the formula between sea level n atm pressure, the normal… [cont.]
Answered by Pro bono publico - Mon Apr 12 03:20:41 2010
On Venus the surface atmospheric pressure is about 90 Earth atmospheres. What is the Venusian atmospheric pres?
Q. On Venus the surface atmospheric pressure is about 90 Earth atmospheres. What is the Venusian atmospheric pressure in kilopascals? Thanks a ton! Please help asap!
Asked by Confused - Mon Jan 18 23:45:59 2010 - Chemistry - 1 Answers - Comments
A. Earth's pressure at sea level is 101.3 k Pa. So, 90*101.3 k Pa = ? k Pa
Answered by Pr0blumz - Tue Jan 19 00:08:55 2010
Q. On Venus the surface atmospheric pressure is about 90 Earth atmospheres. What is the Venusian atmospheric pressure in kilopascals? Thanks a ton! Please help asap!
Asked by Confused - Mon Jan 18 23:45:59 2010 - Chemistry - 1 Answers - Comments
A. Earth's pressure at sea level is 101.3 k Pa. So, 90*101.3 k Pa = ? k Pa
Answered by Pr0blumz - Tue Jan 19 00:08:55 2010
Where can you find records of historic atmospheric pressure?
Q. I need historic atmospheric pressure data (going back as long as possible, minimum of 15 years). I've Googled all over the place, but can't seem to find anything.
Asked by crazytscmonkey - Sun Jun 8 23:32:36 2008 - Other - Science - 1 Answers - Comments
A. The web page listed below contains links to a variety of archived NOAA datasets, maps and so on. Perhaps you'll find the data you need among these sources. Good luck!
Answered by EXPO - Sun Jun 8 23:47:34 2008
Q. I need historic atmospheric pressure data (going back as long as possible, minimum of 15 years). I've Googled all over the place, but can't seem to find anything.
Asked by crazytscmonkey - Sun Jun 8 23:32:36 2008 - Other - Science - 1 Answers - Comments
A. The web page listed below contains links to a variety of archived NOAA datasets, maps and so on. Perhaps you'll find the data you need among these sources. Good luck!
Answered by EXPO - Sun Jun 8 23:47:34 2008
When atmospheric pressure changes, what happens to the absolute pressure at the bottom of a pool?
Q. When atmospheric pressure changes, what happens to the absolute pressure at the bottom of a pool? A) It does not change. B) It changes by a lesser amount. C) It changes by a greater amount. D) It changes by the same amount
Asked by Sami A - Sun Mar 28 19:02:15 2010 - Physics - 2 Answers - Comments
A. D) It changes by the same amount Although it depends on what you mean by "the same amount" If atmospheric pressure rises by 10 k Pa, (perhaps in an extreme weather pattern). The bottom of a pool will rise in absolute pressure by 10 k Pa. It will not rise by the same factor as atmospheric pressure, but it will rise arithmetically by the same amount of pressure.
Answered by gintable - Sun Mar 28 19:11:49 2010
Q. When atmospheric pressure changes, what happens to the absolute pressure at the bottom of a pool? A) It does not change. B) It changes by a lesser amount. C) It changes by a greater amount. D) It changes by the same amount
Asked by Sami A - Sun Mar 28 19:02:15 2010 - Physics - 2 Answers - Comments
A. D) It changes by the same amount Although it depends on what you mean by "the same amount" If atmospheric pressure rises by 10 k Pa, (perhaps in an extreme weather pattern). The bottom of a pool will rise in absolute pressure by 10 k Pa. It will not rise by the same factor as atmospheric pressure, but it will rise arithmetically by the same amount of pressure.
Answered by gintable - Sun Mar 28 19:11:49 2010
How is atmospheric pressure related to weather forecasting?
Q. Please explain in detail how atmospheric pressure is used in weather forecasting. Also please explain its advantages, disadvantages and limitations. Please cite your sources too.
Asked by ADmessi411 - Sat Nov 13 21:17:33 2010 - Weather - 1 Answers - Comments
A. Understanding air pressure The weight of the air pressing down on the Earth, the ocean and on the air below causes air pressure. Earth's gravity, of course, causes the downward force that we know as "weight." Since the pressure depends upon the amount of air above the point where you're measuring the pressure, the pressure decreases as you go higher. Air pressure is related to its density, which is related to the air's temperature and height above the Earth's surface. (Related: Understanding air density). Air pressure changes with the weather. In fact, it's one of the most important factors that determines what the weather is like. (Related: How high and low pressure affect the weather). You can do some basic weather forecasting… [cont.]
Answered by gee bee - Sat Nov 13 23:36:34 2010
Q. Please explain in detail how atmospheric pressure is used in weather forecasting. Also please explain its advantages, disadvantages and limitations. Please cite your sources too.
Asked by ADmessi411 - Sat Nov 13 21:17:33 2010 - Weather - 1 Answers - Comments
A. Understanding air pressure The weight of the air pressing down on the Earth, the ocean and on the air below causes air pressure. Earth's gravity, of course, causes the downward force that we know as "weight." Since the pressure depends upon the amount of air above the point where you're measuring the pressure, the pressure decreases as you go higher. Air pressure is related to its density, which is related to the air's temperature and height above the Earth's surface. (Related: Understanding air density). Air pressure changes with the weather. In fact, it's one of the most important factors that determines what the weather is like. (Related: How high and low pressure affect the weather). You can do some basic weather forecasting… [cont.]
Answered by gee bee - Sat Nov 13 23:36:34 2010
Why is the pressure above the parachute roughly equal to atmospheric pressure?
Q. Why is the pressure above the parachute roughly equal to atmospheric pressure? A parachute slows your descent after you jump out of a plane. In the parachute's frame of reference, wind is blowing upward toward it and its large area creates a great deal of upward drag force. This drag opposes your weight and slows your fall. please help me!!!
Asked by twinklingstar - Thu Jan 10 05:16:06 2008 - Physics - 2 Answers - Comments
A. bc you are moving at a constant velocity
Answered by Jack J - Thu Jan 10 05:19:21 2008
Q. Why is the pressure above the parachute roughly equal to atmospheric pressure? A parachute slows your descent after you jump out of a plane. In the parachute's frame of reference, wind is blowing upward toward it and its large area creates a great deal of upward drag force. This drag opposes your weight and slows your fall. please help me!!!
Asked by twinklingstar - Thu Jan 10 05:16:06 2008 - Physics - 2 Answers - Comments
A. bc you are moving at a constant velocity
Answered by Jack J - Thu Jan 10 05:19:21 2008
What would happen to the atmospheric pressure if gravity was reduced?
Q. If the gravity of the earth was, say, halved, then what would happen to the atmospheric pressure at sea level? And, if you feel up to it, what about the pressure at the bottom of a lake? Thanks!
Asked by Fred L - Wed Apr 7 14:01:46 2010 - Physics - 1 Answers - Comments
A. Pressure is force / unit area. Since f=ma halving gravity would halve the force and halve the pressure. It doesn't matter where - the pressure would be halved everywhere. I hope this helps.
Answered by texas - Wed Apr 7 14:08:36 2010
Q. If the gravity of the earth was, say, halved, then what would happen to the atmospheric pressure at sea level? And, if you feel up to it, what about the pressure at the bottom of a lake? Thanks!
Asked by Fred L - Wed Apr 7 14:01:46 2010 - Physics - 1 Answers - Comments
A. Pressure is force / unit area. Since f=ma halving gravity would halve the force and halve the pressure. It doesn't matter where - the pressure would be halved everywhere. I hope this helps.
Answered by texas - Wed Apr 7 14:08:36 2010
What is the atmospheric pressure at the peak of Mount Denali?
Q. At the summit of Mount Denali (20,320 ft) water boils at 348K. The heat of vaporization of water is 42,000J/mole and is independent of temperature between 348K and 373K. What is the atmospheric pressure at the peak of Mount Denali?
Asked by Eric - Fri Jul 22 01:14:31 2011 - Physics - 1 Answers - Comments
A. Water boils, when the ambient atmospheric pressure equals its vapor pressure You know that at sea-level water boils at T1 = 373 K while pressure is P1 = 1 atm Boiling pressure and temperature are related by the Clausius-Clapeyron-equation [1]: ln(P2/P1) = ( H_v/R) ((1/T1) - (1/T2)) So the atmospheric pressure at the top of the mountain is: P2 = P1 e^[ ( H_v/R) ((1/T1) - (1/T2)) ] = 1atm e^[ (42000 Jmol 1 / 8.3145 Jmol 1K 1) ((1/373K) - (1/348K)) ] = 0.378 atm
Answered by schmiso - Mon Jul 25 06:18:09 2011
Q. At the summit of Mount Denali (20,320 ft) water boils at 348K. The heat of vaporization of water is 42,000J/mole and is independent of temperature between 348K and 373K. What is the atmospheric pressure at the peak of Mount Denali?
Asked by Eric - Fri Jul 22 01:14:31 2011 - Physics - 1 Answers - Comments
A. Water boils, when the ambient atmospheric pressure equals its vapor pressure You know that at sea-level water boils at T1 = 373 K while pressure is P1 = 1 atm Boiling pressure and temperature are related by the Clausius-Clapeyron-equation [1]: ln(P2/P1) = ( H_v/R) ((1/T1) - (1/T2)) So the atmospheric pressure at the top of the mountain is: P2 = P1 e^[ ( H_v/R) ((1/T1) - (1/T2)) ] = 1atm e^[ (42000 Jmol 1 / 8.3145 Jmol 1K 1) ((1/373K) - (1/348K)) ] = 0.378 atm
Answered by schmiso - Mon Jul 25 06:18:09 2011
How atmospheric pressure is inserted in the pressure gauge?
Q. My ques is, what is the contribution or benefit using atmospheric pressure in the pressure gauge,
Asked by Zunaead S - Thu Jul 10 06:43:56 2008 - Engineering - 3 Answers - Comments
A. Almost all pressure gages are manufactured as differential gages. Atmospheric pressure can be introduced by calibrating the gage against a mercury barometer of an aneroid barometer made with as near a perfect vacuum as can be attained inside. Two applications of adjusting for atmospheric pressure are: Absolute pressure is necessary for calculations involving Boyle's Law or the Ideal Gas Law. Altimeters are essentially pressure gages, and must be adjusted to local atmospheric pressure in order to read out "true" altitude.
Answered by Helmut - Thu Jul 10 07:55:21 2008
Q. My ques is, what is the contribution or benefit using atmospheric pressure in the pressure gauge,
Asked by Zunaead S - Thu Jul 10 06:43:56 2008 - Engineering - 3 Answers - Comments
A. Almost all pressure gages are manufactured as differential gages. Atmospheric pressure can be introduced by calibrating the gage against a mercury barometer of an aneroid barometer made with as near a perfect vacuum as can be attained inside. Two applications of adjusting for atmospheric pressure are: Absolute pressure is necessary for calculations involving Boyle's Law or the Ideal Gas Law. Altimeters are essentially pressure gages, and must be adjusted to local atmospheric pressure in order to read out "true" altitude.
Answered by Helmut - Thu Jul 10 07:55:21 2008
What is the equation for atmospheric pressure?
Q. I am wondering what the equation for atmospheric pressure because my physics teacher gave me a take-home test with random questions on it. I need help with this one. What will be the pressure in atmospheres felt by a bathysphere at 35,813 ft in the Marianas Trench?
Asked by demarr_10 - Sun Feb 22 09:10:44 2009 - Physics - 1 Answers - Comments
A. for every 33 feet down the pressure increases one atm so 33 ft would be 2atm 66 ft 3 atm 99 ft 4 atm etc
Answered by Lee S - Sun Feb 22 09:47:07 2009
Q. I am wondering what the equation for atmospheric pressure because my physics teacher gave me a take-home test with random questions on it. I need help with this one. What will be the pressure in atmospheres felt by a bathysphere at 35,813 ft in the Marianas Trench?
Asked by demarr_10 - Sun Feb 22 09:10:44 2009 - Physics - 1 Answers - Comments
A. for every 33 feet down the pressure increases one atm so 33 ft would be 2atm 66 ft 3 atm 99 ft 4 atm etc
Answered by Lee S - Sun Feb 22 09:47:07 2009
What is the relationship between forces of attraction, vapor pressure, and atmospheric pressure?
Q. If you're above sea level, vapor pressure is stronger, and atmospheric pressure is weaker. What do the forces of attraction have to do with this? If you're below sea level, vapor pressure is weaker, and atmospheric pressure is stronger. What do the forces of attraction have to do with this? I'm asking this because the boiling points different liquids depends on the vapor pressure and forces of attraction. I get that the stronger the forces of attraction take longer to boil, but how does this fit in with the above? ~studying for a chem test tomorrow. Help would be great. Thanks!
Asked by Angelina - Wed Oct 1 14:33:37 2008 - Chemistry - 1 Answers - Comments
A. probably you have already done the test; however it is important to note that your question shows a conceptual mistake; in fact there is no connection between the vapor pressure and the height of the material in the gravity field; vapor pressure depends only on the temperature and the composition of the system NOT on its height; the atmospheric pressure depends on the height and so also the boiling temperature for the effect of the pressure; vapor pressure at the same temperature and composition is the same (on the contrary forces of attraction depends on the composition) so finally the decrease of the external atmospheric pressure allows to the identical vapor pressure and forces of attraction to make the liquid boils; it is the external… [cont.]
Answered by devoldev - Sat Oct 4 09:03:47 2008
Q. If you're above sea level, vapor pressure is stronger, and atmospheric pressure is weaker. What do the forces of attraction have to do with this? If you're below sea level, vapor pressure is weaker, and atmospheric pressure is stronger. What do the forces of attraction have to do with this? I'm asking this because the boiling points different liquids depends on the vapor pressure and forces of attraction. I get that the stronger the forces of attraction take longer to boil, but how does this fit in with the above? ~studying for a chem test tomorrow. Help would be great. Thanks!
Asked by Angelina - Wed Oct 1 14:33:37 2008 - Chemistry - 1 Answers - Comments
A. probably you have already done the test; however it is important to note that your question shows a conceptual mistake; in fact there is no connection between the vapor pressure and the height of the material in the gravity field; vapor pressure depends only on the temperature and the composition of the system NOT on its height; the atmospheric pressure depends on the height and so also the boiling temperature for the effect of the pressure; vapor pressure at the same temperature and composition is the same (on the contrary forces of attraction depends on the composition) so finally the decrease of the external atmospheric pressure allows to the identical vapor pressure and forces of attraction to make the liquid boils; it is the external… [cont.]
Answered by devoldev - Sat Oct 4 09:03:47 2008
From Yahoo Answer Search: 'atmospheric pressure'
Tue Dec 27 09:53:41 2011