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Work done in Isothermal Irreversible Process

An ideal gas ...

Question

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

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Solution

The correct option is D
$(I) Reversible isothermal - ------------ \to expansion (I I) Reversible adiabatic - ----------- \to expansion (I I I)$
So, the correct option is/are:
Reversible isothermal process is isoenthalpic while reversible adiabatic process is isoentropic.

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I

I I

I I

I I I

I

I I I

(p : pressure, V : volume, T : temperature, H : enthalpy, S : entropy)

i

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