Question

For the following reaction X + Y $\rightleftharpoons$ A + B at 300 K, it is found equilibrium constant equal to 10³. Therefore, DG &DG⁰ of the reaction at 300 K respectively are –

• A. Both are equal to zero
• B. 17.23 KJ & zero
• C. Zero and –17.23 KJ
• D. Both are equal to –17.23 KJ

Answer 1

Answer: (C)

Zero and –17.23 KJ

Answer 2

DG⁰ = – RT ln K_eq

DG⁰ = – 2.303 RT log K_eq

DG⁰ = – 2.303 × 8.314 × 300 × 10^–3 × 3

DG⁰ = – 17.23 KJ

Since the given reaction is at equilibrium hence DG = 0