What is delta S for the vaporization of water?

Question

The normal boiling point of water is 100C and deltaHvap is 44.0kJmol-1.

a) 0.44 J K-1 mol-1
b) 440 J K-1 mol-1
c) 847 J K-1 mol-1
d) 161 J K-1 mol-1
e) 118 J K-1 mol-1

Answer 1

deltaG = deltaH - TdeltaS

When delta G equals zero,

deltaH = TdeltaS

deltaS = deltaH/T = (44.0 kJ/mol)/373K = 0.11796 kJ/mol.K

So I'd pick e.