Question

An ideal gas undergoes a reversible isothermal expansion from state I to state II followed by a reversible adiabatic expansion from state II to state III. The correct plot(s) representing the changes from state I to state III is(are)
( $p$ : pressure, $V$ : volume, $T$ : temperature, $H$ : enthalpy, $S$ : entropy)

• A.
• B.
• C.
• D.

Answer 1

Answer: (A), (B), (D)

$(I)\underset{\text{expansion}}{\overset{\text{Reversible isotherm}}{\to }}(II)\underset{\text{expansion}}{\overset{\text{Reversible adiabatic}}{\to }}(III)$
So, the correct option is/are:



Reversible isothermal process is isoenthalpic while reversible adiabatic process is isoentropic.