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Which of the following statements is correct for a reversible process in a state of equilibrium?
A
$\Delta G = -2.30RT\log K$
B
$\Delta G = 2.30RT\log K$
C
$\Delta G^\circ = -2.30RT\log K$
D
$\Delta G^\circ = 2.30RT\log K$
Detailed Solution
$\Delta_rG = \Delta_rG^\circ + RT\ln Q$; at equilibrium $\Delta_rG = 0$ and Q = K.
$0 = \Delta_rG^\circ + RT\ln K$
$\Delta_rG^\circ = -RT\ln K = -2.303RT\log K$
$0 = \Delta_rG^\circ + RT\ln K$
$\Delta_rG^\circ = -RT\ln K = -2.303RT\log K$