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A sample of gas is compressed from an initial volume of $2 V_{0}$ to $V_{0}$ using three different processes.
First : Using reversible isothermal
Second: Using reversible adiabatic
Third: Using irreversible adiabatic under a constant external pressure, then

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Final temperature of gas will be highest at the end of second process

Enthalpy change of sample will be highest in isothermal process. (magnitude wise)

Final temperature of gas will be highest at the end of third process

Final pressure of gas will be highest at the end of second process.

answer is A.

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Detailed Solution

During isothermal process, temperature remains constant. While, during adiabatic compression, final temp $↑$ , because $q = - w; w < 0 \Rightarrow q > 0$ . Irreversible work > Reversible work.

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