pressure to condense

[Ice-cream]

can any1 give me some help on this question:

 

What pressure would have to be applied to steam at 300 degrees C to condense it into liquid water (delta H(vap) = 40.7 kJ/mol)?

 

Ans. 97.6 atm

 

I really have no idea wat to do, i can't even start it!! i don't even know which formulae would be used...any1 got any ideas?

[swansont]

can any1 give me some help on this question:

 

What pressure would have to be applied to steam at 300 degrees C to condense it into liquid water (delta H(vap) = 40.7 kJ/mol)?

 

Ans. 97.6 atm

 

I really have no idea wat to do' date=' i can't even start it!! i don't even know which formulae would be used...any1 got any ideas?[/quote']

 

I'd guess that you need a formula that relates T, P and H

 

Try this page