The best measure of the spontaneity of a process is:

Question

Quizplus · Accepted Answer

The change in free energy (ΔG) is the most reliable measure of spontaneity because it takes into account both the change in enthalpy (ΔH) and the change in entropy (ΔS) of the system: ΔG = ΔH - TΔS. For a process to be spontaneous, ΔG must be negative. A negative ΔG means that the system is releasing more energy than it is absorbing, and that there is an increase in entropy. The other options (A, B, D, and E) do not account for both ΔH and ΔS and are therefore not as reliable as a measure of spontaneity.

The Best Measure of the Spontaneity of a Process Is