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Multiple choice questions in free energy change.

1. The enthalpy and entropy change of a reaction are -6.1 kJ/mole and +38.9 J/mole K respectively 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 respectively

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 calculate 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

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Category:- Chemistry
Reference No.:- M9167431

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