What is the Boiling Point of Water in Breckenridge?

[meganw]

Homework Statement

In Breckenridge, Colorado, the typical atmospheric pressure is 520. torr. What is the boiling point of water (ΔH = 40.7 kJ/mol) in Breckenridge?

What pressure would have to applied to steam at 331°C to condense the steam to liquid water?

Homework Equations

Not sure! Our teacher hasn't taught us! T=delta H/S??

The Attempt at a Solution

She hasn't taught us anything! :(

 

[mgb_phys]

I don't know how (or even if) you can work it out from first principles but experimentally it is given by Antoine's equation (http://en.wikipedia.org/wiki/Antoine_equation)

 

[Ygggdrasil]

It can be calculated from first principles. Look up the Clausius-Clapeyron equation on wikipedia (http://en.wikipedia.org/wiki/Clausius-Clapeyron_relation, the most useful from of the equation is under the applications section) or preferably in your chemistry text.