Question

What is the free energy change for a reaction at equilibrium?

Short answer

The system does not workon its surroundings, there isno net change in the system's free energy.

Step-by-step solution

Gibb’s free energy

Gibbs free energy, often known as free energy, is a thermodynamic potential that aids in the calculation of maximum reversible work in a thermodynamic system under constant pressure and temperature. The maximum amount can be reached by a method that is totally reversible.

Free energy change at equilibrium

Thermodynamic equilibrium is defined as a situation in which there is no net flow of energy or matterbetween or within systems. When a system is in equilibrium, macroscopic change does not occur.

When a system transitions from its initial to its final state, the work done to the environment by the system is deducted from the work done by pressure forces, resulting in a drop in the free energy of the system.