The molar heat of fusion of water is 6010J/mol.calculate the entropy change for the ice to water transition at 0degre.
Deduce the entropy from liquid to solid transition
dG = dH - TdS
The system is at equilibrium between ice and water @ 0 C, so dG = 0
0 = 6010 J/mol - 273.15*dS
Solve for dS.
For the second part, dH will be negative for the reverse transition.