The heat of vaporization for 1.0 mole of water at 100.°C is 40.62 kJ/mol. Calculate δssurr for the process H2O(l) → H2O(g) at 100.°C.
a) -40.62 kJ
b) 40.62 kJ
c) 0 kJ
d) Cannot be determined from the given information