Question

A gas flows through a one-inlet, one-exit control volume operating at steady state. Considering an adiabatic control volume with no internal irreversibilities, the specific entropy at the exit is __________.

a. greater than the specific entropy of the gas at the inlet.
b. equal to the specific entropy of the gas at the inlet.
c. less than the specific entropy of the gas at the inlet.

Answer 1

b. equal to the specific entropy of the gas at the inlet.

Step-by-step explanation:

Isentropic process is the process in which the entropy of the system remains unchanged. The word isentropic is formed from the combination of the prefix "iso" which means "equal" and the word entropy.

If a process is completely reversible, without the need to provide energy in the form of heat, then the process is isentropic.