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Saturday, April 01, 2006
HW #2 - P #7 - Vapor Pressure of Water
During a hot summer day at the beach when the air temperature is 30°C, someone claims the vapor pressure in the air to be 5.2 kPa. Is this claim reasonable?
5 comments:
Anonymous
said...
what exactly is a criteria for reasonable? i get about .0052 for the vapor pressure which corresponds to about 35ish which seems right but i just looked at the table and i guess the full question is is this the right way of going about it..? just the table?
Anon @ 4:42 You can assume Patm = 1 atm or 101.325 kPa, but it is not necessary to solve the problem. All you need to do is calculate the actual partial pressure of water in the air and compare it to the value claimed. If it matches to 2 sig figs, then I would call the claim valid.
5 comments:
what exactly is a criteria for reasonable? i get about .0052 for the vapor pressure which corresponds to about 35ish which seems right but i just looked at the table and i guess the full question is is this the right way of going about it..? just the table?
Anon 11:14 PM:
Compare the claimed partial pressure to your actual partial pressure. If they are the same to 2 sif figs, then the claim is reasonable.
Can you assume P = 1 atm?
Anon @ 4:42
You can assume Patm = 1 atm or 101.325 kPa, but it is not necessary to solve the problem.
All you need to do is calculate the actual partial pressure of water in the air and compare it to the value claimed. If it matches to 2 sig figs, then I would call the claim valid.
cool...that was a very nice information you have discussed.. .thanks a lot for sharing..
vapor recovery unit
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