Multiple choice problems in free energy change.
1. The enthalpy and entropy change of a reaction are -6.1 kJ/mole and +38.9 J/mole K correspondingly at 25ºC. What is the free energy change in kJ/mole?
A.-17.7
B.-11.6
C.-5.5
D.+5.5
E.+17.7

2. The enthalpy and entropy change of a reaction are -26.1 kJ/mole and +3.89 J/mole K correspondingly at 25ºC. What is the free energy change in kJ/mole?
A.-30.3
B.-27.3
C.-24.9
D.-17.3
E.+24.9

3.Using the listed information find out Kp at 25ºC.
Ag2O(s) " 2 Ag(s) + 1/2 O2(g)
Hºf (kJ/mole) -31.0, 0.0, 0.0
Sº (J/K.mole) 121.3, 42.6, 205.1
A.2.22 x 10-3
B.3.41 x 10-2
C.2.22 x 10-2
D.1.09 x 10-2
E.4.41 x 10-1