Question

Which of the following statements about state of equilibrium in a chemical system is correct-

• A. At equilibrium, the Gibb's function of system is at it's highest value
• B. At equilibrium, the entropy of system is at it's highest value
• C. At equilibrium, change in Gibb's function of system is minimum.
• D. At equilibrium, the entropy of an isolated system is at its maximum value

Answer 1

Answer: (C)

The Gibb's energy is also the chemical potential that is minimised when a system reaches equilibrium at constant pressure and temperature. Thus, the Gibbs's energy $G$ is a quantity that becomes more negative during the state of equilibrium in a chemical system.