The value of the equilibrium constant for the reaction of nickel(II)ions with cadmium metal is 1.17 $\times$ 10⁵.Calculate $\Delta$G° for the reaction at 25°C.

Question

Quizplus · Accepted Answer

The relationship between the equilibrium constant and the standard free energy change is given by the equation:

ΔG° = -RTlnK

where R is the gas constant (8.314 J/mol.K), T is the temperature in Kelvin (25°C = 298 K), and ln is the natural logarithm.

Substituting the given equilibrium constant into the above equation:

ΔG° = - (8.314 J/mol.K)(298 K) ln(1.17 x 10^10)

ΔG° = -28.9 kJ/mol

Therefore, the best choice is B, which is -28.9 kJ.

The Value of the Equilibrium Constant for the Reaction of Nickel(II)ions