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Equipartition Theorem

2 moles of id...

Question

2 moles of ideal gas at $27^{o} C$ temperature is expanded reversibly from 2 L to 20 L. Find entropy change: (R= 2 cal/ mol K).

A

92.1

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B

0

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C

4

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D

9.2

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Solution

The correct option is B 92.1
$Δ S$ (Entropy change) = 2.303 n R $l o g_{10} \frac{V_{2}}{V_{1}}$
$= 2.303 \times 2 \times 2 \times l o g_{10} \frac{20}{2}$
$2.303 \times 2 \times 2 \times 1$
$= 9.212 c a l$

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