Posted by tre on .
what is the heat of vaporization if the vapor pressure of liquid water at 25 °C is 23.8 Torr and at a boiling point of 100 °C is 760 Torr.

chemistry 
DrBob222,
Use th ClausiusClapeyron equation and solve for delta H vap.

chemistry 
tre,
so technically (P1, T1) is 25 °C 23.8 Torr and (P1, T2) is 100 °C is 760 Torr? Or is it the other way around? so what is R?

chemistry 
tre,
is this set up correct?
ln(760torr/23.8torr) = delta Hvap/ 8.31447 (1/373K  1/298K)