Air pressure dependent water evaporation

  • Thread starter lesy1
  • Start date
  • #1
lesy1
12
0
Imagine a water basin, surrounded by air. How does evaporation speed of water change if the air pressure of surrounding air is 1.000Pa, 10.000Pa, 100.000Pa, 1.000.000Pa, 10.000.000Pa. What is an order of magnite of the evaporation speed change. Where can I read more about that?
Regards.
 

Answers and Replies

  • #2
cjl
Science Advisor
1,980
569
The surprising answer is that it doesn't change. The evaporation speed is dependent on the partial pressure of the water vapor above it, not the total pressure of the air.

The exception to this is if the air pressure is lower than the water's vapor pressure. Then the water will boil, which significantly increases its evaporation speed (I don't know an exact number though).
 
  • #3
lesy1
12
0
Does there exist any liquid which would change the evaporation speed as a function of air pressure?
 
  • #4
Bystander
Science Advisor
Homework Helper
Gold Member
5,418
1,503
The surprising and incorrect answer is that it doesn't change. (snip)

You are looking for the "Poynting correction."
 

Suggested for: Air pressure dependent water evaporation

  • Last Post
Replies
9
Views
1K
Replies
9
Views
1K
Replies
23
Views
615
  • Last Post
Replies
12
Views
1K
Replies
27
Views
1K
Replies
9
Views
353
  • Last Post
Replies
3
Views
474
Replies
68
Views
1K
Replies
4
Views
304
Replies
9
Views
794
Top