Question: In a reversible process, the change in Gibbs free energy (ΔG) is:
Options:
Always positive
Always negative
Zero at equilibrium
None of the above
Correct Answer: Zero at equilibrium
Solution:
In a reversible process, the change in Gibbs free energy (ΔG) is zero at equilibrium.
In a reversible process, the change in Gibbs free energy (ΔG) is:
Practice Questions
Q1
In a reversible process, the change in Gibbs free energy (ΔG) is:
Always positive
Always negative
Zero at equilibrium
None of the above
Questions & Step-by-Step Solutions
In a reversible process, the change in Gibbs free energy (ΔG) is:
Step 1: Understand what Gibbs free energy (ΔG) is. It is a measure of the energy available to do work in a system.
Step 2: Know that a reversible process is one that can go forward and backward without losing energy.
Step 3: Recognize that equilibrium is the state where the forward and reverse processes occur at the same rate.
Step 4: At equilibrium, there is no net change in the system, meaning the system is stable.
Step 5: Since there is no change in the system at equilibrium, the change in Gibbs free energy (ΔG) is zero.
Gibbs Free Energy – Gibbs free energy (G) is a thermodynamic potential that measures the maximum reversible work obtainable from a thermodynamic system at constant temperature and pressure.
Equilibrium – In a reversible process, equilibrium is the state where the forward and reverse reactions occur at the same rate, resulting in no net change in the system.
Reversible Process – A reversible process is an idealized process that can be reversed without leaving any trace on the surroundings, and it occurs infinitely slowly.
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