MCQ
Work done in isothermal reversible process for ideal gas is-
- A$-nRT\ ln\ \frac{V_2}{V_1}$
- B$- P(V_2 - V_1)$
- C$\left( {\frac{{{P_2}{V_2} - {P_1}{V_1}}}{{\gamma - 1}}} \right)$
- D$0$
process of work done
$\int \mathrm{d} \mathrm{w}=-\int_{\mathrm{V}_{1}}^{\mathrm{V}_{2}} \mathrm{PdV}$
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[Given : Molar mass of water $=18 \mathrm{~g} \mathrm{~mol}^{-1}$, acetic acid $=60 \mathrm{~g} \mathrm{~mol}^{-1}$ ]
${ }^{\mathrm{K}_{\mathrm{f}}} \mathrm{H}_2 \mathrm{O}: 1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
$\mathrm{K}_{\mathrm{r}}$ acetic acid : $3.90 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$
freezing point: $\mathrm{H}_2 \mathrm{O}=273 \mathrm{~K}$, acetic acid $=290 \mathrm{~K}$ ]
$[$ Given $: \sqrt{2}=1.41]$
