In a reversible process, the change in Gibbs free energy is equal to:

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Question: In a reversible process, the change in Gibbs free energy is equal to:

Options:

Correct Answer: Zero

Solution:

In a reversible process at equilibrium, the change in Gibbs free energy is zero.

In a reversible process, the change in Gibbs free energy is equal to:

In a reversible process, the change in Gibbs free energy is equal to:

Step 1: Understand what a reversible process is. A reversible process is one that can be reversed without leaving any change in the system or surroundings.
Step 2: Know what Gibbs free energy is. Gibbs free energy is a measure of the energy available to do work in a system at constant temperature and pressure.
Step 3: Learn about equilibrium. Equilibrium is the state where the forward and reverse reactions occur at the same rate, and there is no net change in the system.
Step 4: Recognize that in a reversible process at equilibrium, the system is balanced. This means that there is no driving force for the reaction to proceed in either direction.
Step 5: Conclude that because the system is at equilibrium, the change in Gibbs free energy (ΔG) is zero. This means there is no net change in energy available to do work.

Gibbs Free Energy – Gibbs free energy is a thermodynamic potential that measures the maximum reversible work obtainable from a system at constant temperature and pressure.
Reversible Process – A reversible process is an idealized process that occurs infinitely slowly, allowing the system to remain in equilibrium at all times.
Equilibrium Condition – At equilibrium, the Gibbs free energy of a system does not change, indicating that the system is in a state of balance.