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4 moles of an ideal monoatomic gas is he...

4 moles of an ideal monoatomic gas is heated isobarically so that its absolute temperature increases 2 times. Then the entropy increment of the gas in this process is

A

285.J/k

B

42.5J/k

C

57.5J/k

D

76.5J/k

Text Solution

Verified by Experts

The correct Answer is:
C
`dS=(dQ)/(T)`
`intdS=nc_(P)underset(T_(0))overset(2T_(0))int(dT)/(T)`
`DeltaS=4xx(5R)/(2)ln2=10Rln2=10xx(25)/(3)xx0.69`
`25xx2.3=57.5J//k`
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