posted by Jayme .
Calculate the entropy change of the universe (in J/K) when 12.2 g of chlorine are melted in a laboratory at 24.8 oC. Report your answer in scientific notation to three significant figures.
Melting Point (°C) -101.0
Boiling Point (°C) -34.1
ÄHo(Fusion) (kJ/mol) 6.40
ÄHo(Vaporization) (kJ/mol) 20.41
which ones am i supposed to use...?