- A

- B

- ✓

- DAll are equal




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$\ \ \ \ \ \ \ \ \ \ \ +\\\text{CH}_3-\text{CH}-\text{OCH}_3$
$\ \ \ \ \ \ \ \ \ \ \ +\\\text{CH}_3-\text{CH}-\text{OCH}_3$
$\ \ \ \ \ \ \ \ \ \ \ +\\\text{CH}_3-\text{CH}-\text{CH}_2-\text{OCH}_3$
Assume that there is no other way of consuming stored energy.Given : The enthalpy of evaporation of water is $45\,kJ\,mol ^{-1}$
Molar mass of $C , H$ and $O$ are $12.1$ and $16\,g\,mol ^{-1}$
[$A$] The work done on the gas is maximum when it is compressed irreversibly from ( $\mathrm{p}_2, \mathrm{~V}_2$ ) to ( $\mathrm{p}_1, \mathrm{~V}_1$ ) against constant pressure $\mathrm{pl}_1$
[$B$] The work done by the gas is less when it is expanded reversibly from $V_1$ to $V_2$ under adiabatic conditions as compared to that when expanded reversibly from $V_1$ to $V_2$ under isothermal conditions
[$C$] The change in internal energy of the gas is ($i$) zero, if it is expanded reversibly with $T_1=T_2$, and ($ii$) positive, if it is expanded reversibly under adiabatic conditions with $T_1 \neq T_2$
[$D$] If the expansion is carried out freely, it is simultaneously both isothermal as well as adiabatic