A gas flows through a one$-$inlet, one$-$exit control volume operating at steady state. Heat transfer at a given rate takes place at a location on the boundary where the temperature is $T_b.$ Determine whether the specific entropy at the exit is greater than, equal to$,$ or less than the specific entropy of the gas at the inlet:

No internal irreversibilities, no heat transfer rate

No internal irreversibilities, heat transfer rate out of the system

No internal irreversibilities, heat transfer rate into the system

Internal irreversibilities present, no heat transfer rate

Internal irreversibilities present, heat transfer rate into system