Question

What is the physical significance of Gibbs function?

• A. Decrease in Gibbs function is the measure of the useful work done by the system.
• B. in crease in Gibbs function is the measure of the useful work done by the system.
• C. decrease in Gibbs function is the measure of the useful heat loss by the system.
• D. None

Answer 1

The correct option is A Decrease in Gibbs function is the measure of the useful work done by the system.

Decrease in Gibb's function at constant temperature and pressure in a process gives an estimate or measure of maximum non-PV work (useful work) which can be obtained from system in reversible, manner. The example of non-PV work is electrical work done by chemical battery.