MCQ
The entropy change involved in the isothermal reversible expansion of $2$ mole of an ideal gas from a volume of $10\, dm^3$ to a volume of $100\, dm^3$ at $27\,^oC$ is : .............. $\mathrm{J\,mol}^{-1} \, \mathrm{K} ^{-1}$
  • A
    $38.3$
  • $35.8$
  • C
    $32.3$
  • D
    $42.3$

Answer

Correct option: B.
$35.8$
b
Entropy change for an isothermal reversible process is given by

$\Delta S=n R \ln \frac{V_{2}}{V_{1}}$

$=2 \times 8.314 \times 2.303 \log \frac{100}{10}$

$=38.3 \,J \mathrm{\,mol}^{-1} \,K^{-1}$

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free