The useful work potential of energy is called: a. Exergy b. Power c. Equilibrium d. Reversible work

a) Exergy

Explanation:

The useful work potential is called exergy. All practical process are ir-reversible process due to ir-reversibility, the entropy of system increases and this leads to destroy the energy.

The rate of work is called power.

Reversible work is the maximum obtain work potential because it have all processes reversible.

So from this our option a is right.