The mathematical expression for the change in free energy of a system is ΔG = ΔH - TΔS. Which of the following statements is correct?
A) ΔS is the change in enthalpy, a measure of randomness.
B) ΔH is the change in entropy, the energy available to do work.
C) ΔG is the change in free energy.
D) T is the temperature in degrees Celsius.

Question

Quizplus · Accepted Answer

ΔG is the change in free energy, which is the energy that can be used to do work under constant temperature and pressure. ΔH is the change in enthalpy, which is an indication of the total heat content of the system, while ΔS is the change in entropy, which is a measure of the degree of randomness or disorder in the system. T represents the temperature in Kelvin.

The Mathematical Expression for the Change in Free Energy of a System