Question

Does entropy not remain the same for adiabatic irreversible

Answer 1

Explanation:

Change of entropy for irreversible adiabatic process must be greater than zero. In adiabatic process, change of entropy due to heat interactions is zero. But as process is irreversible, change of entropy due to internal irreversibility is greater than zero. ... Hence in an adiabatic irreversible process entropy increases.

Answer 2

Explanation:

7.4 The adiabatic process

7.4 The adiabatic processi.e. the entropy of a system remains constant. In other words, areversible adiabatic process is an isentropic process at the sametime. In this irreversible adiabatic process dq = 0, but ds > 0, hence, an irreversible adiabatic process is not isentropic.