Question
Identify from following, the relation between standard free energy change in a reaction and equilibrium constant K_c.
MHT CET
Chemistry
Thermodynamics (C)
2026
MHT CET 2026 (19 April Shift 1)
MHT CET Chemistry Question (2026) — Solution
Options
- A. G^ = RT K_c
- B. - G^ = RT K_c
- C. G^ = K_c RT
- D. - G^ = RT K_c
Answer
D. - G^ = RT K_c
Step-by-step solution
The relation between the free energy change and the reaction quotient is given by G = G^ + RT Q. At equilibrium, the free energy change G = 0 and the reaction quotient Q = K_c. Substituting these values into the equation, we get 0 = G^ + RT K_c. Rearranging the terms yields - G^ = RT K_c. Answer: - G^ = RT K_c
Related: Chemistry — Thermodynamics (C) · All PYQ Banks