Ipho 1987, thermodynamics problem: Moist air ascending over a mountain range

[Jacob White]

So now after these corrections the final temperature I get is 270.89K which is about 0.6K higher than without considering ice. And that makes sense since we get some additional energy from freezing water.

 

[Chestermiller]

So now after these corrections the final temperature I get is 270.89K which is about 0.6K higher than without considering ice. And that makes sense since we get some additional energy from freezing water.

Very nice Jacob. Using the vapor pressure of ice at the final temperature, what do you now predict for the amount rained per kg?

 

[Jacob White]

Much more - about 3.737g.

 

[Chestermiller]

Much more - about 3.737g.

It doesn't seem possible. What vapor pressure did you estimate at the final temperature?

 

[Jacob White]

0.5084 kPa

 

[Chestermiller]

0.5084 kPa

That sounds right, but it implies 2.32 grams/kg

 

[Jacob White]

Sorry again, I forgot about molar masses. 3.737*18/29=2.32