\( \mathrm{P} \) If one mole of an ideal gas \( \left(C_{p, m}=\fra...

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\( \mathrm{P} \)
If one mole of an ideal gas \( \left(C_{p, m}=\frac{5}{2} R\right) \) is
W
expanded isothermally at \( 300 \mathrm{k} \) until it's volume is tripled, then change in entropy of gas is
(1) zero
(2) infinity
(3) \( \frac{5}{2} R \ln 3 \)
(4) \( R \ln 3 \)
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