Question

Equilibrium constant for a reaction is 20. What is the value of ∆G⁰ at 300 K? (R = 8 × 10⁻³ kJ)

Options

• −7.191 kJ mol⁻¹

• −2.763 kJ mol⁻¹

• −5.527 kJ mol⁻¹

• 16.63 kJ mol⁻¹

Answer 1

−7.191 kJ mol⁻¹

Explanation:

K = 20,

T = 300 K,

R = 8 × 10⁻³ kJ K⁻¹ mol⁻¹

∆G⁰ = −2.303 RT log₁₀ K

= −2.303 × 8 × 10⁻³ × 300 × log₁₀ (20)

∴ ∆G⁰ = −7.191 kJ mol⁻¹