The unavailable energy is the product of the lowest temperature of heat rejection and the change of entropy of system during the process of supplying heat.

Question

Quizplus · Accepted Answer

The unavailable energy in a thermodynamic process is indeed the product of the lowest temperature at which heat is rejected (usually the ambient or surrounding temperature) and the change in entropy of the system during the process. This concept is related to the second law of thermodynamics, indicating the portion of energy that cannot be converted into work.

The Unavailable Energy Is the Product of the Lowest Temperature