Which of the following does not express the criterion of spontanetiy?

Options

A. `(dS)_(P, T) > 0`
B. `(dA)_(V, T) gt 0`
C. `(dS)_(P, T) > 0`
D. All of these

Answer

B

Explanation

Helmholtz energy `(A)` is defined as
`A = U - TS`
`:. Delta A = Delta U - Delta (TS)`
Under constant volume and temperature conditions, `Delta A` will be negative for a spontaneous process, positives for a monspontaneous process, and zero for a state of equilibrium.