1. At 25 C for the reaction:

H2(g) + 2Na(s) = 2NaH(s) DH o = -51.28 kJ/mol and DG o = -33.46 kJ/mol.

a) What is the DS o of the reaction?

b) Is this reaction spontaneous? (Explain)

2. Calculate the free energy change for the following reaction.

HOAc(aq) = AcO - (aq) + H + (aq) Ka=1.8x10 -5