[mreff555]

 So, I was just rearranged  :delta:S to  :delta:H/ :delta:S = T
I realized I could probably solve for temperature with that. eg. "heat of vaporization"
So I  looked up the thermodynamic data for water and subtracted the :delta:S and  :delta:H of the liquid state from the gas state. My result is close. I just would have expected it to be closer. Do you think the error is in the thermodynamic data or should I just be expecting more of an approximation with this stuff? The answer I got was 371.40K. Yes I know it's only a degree and a half off. Just curious why.

[sjb]

Perhaps look into things like Trouton's rule, or similar. http://en.wikipedia.org/w/index.php?title=Trouton%27s_rule&oldid=309303595