Question

The difference in entropy ∆S = SB − SA for two states A and B of a system can be computed as the integral dQ/T provided

A) The process is reversible
B) The process is adiabatic
C) The process is isochoric
D) The process is isothermal

Answer 1

The difference in entropy (∆S = SB − SA) for two states A and B of a system can be computed as the integral of dQ/T, provided the process is reversible.

Step-by-step explanation:

The difference in entropy (∆S = SB − SA) for two states A and B of a system can be computed as the integral of dQ/T, provided the process is reversible. In other words, for a reversible process, the change in entropy of the system can be calculated using the equation ∆S = ∫dQ/T.

Entropy is a measure of the disorder of a system, and it increases with an increase in the number of available microstates. The change in entropy can be positive or negative, depending on whether the system becomes more disordered or more ordered.

Therefore, the correct option is A) The process is reversible.