What is the equilibrium constant for a reaction with a standard free-energy change of +25kJ/mol? A) -1.1 B) -10.1 C) 4.1 × 10^-⁵ D) 10.1 E) 2.4 × 10⁴

Question

Quizplus · Accepted Answer

The equilibrium constant (K) is related to the standard free-energy change (ΔG°) by the equation ΔG° = -RTlnK, where R is the gas constant and T is the temperature in Kelvin. Rearranging this equation gives K = e^(-ΔG°/RT). Plugging in the values given in the question, we get K = e^(-(25000 J/mol)/(8.314 J/mol·K)(298 K)) = 4.1 × 10^15. The only answer choice that matches this value is C.

What Is the Equilibrium Constant for a Reaction with a Standard