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When 3.0 mole of an ideal diatomic gas i...

When 3.0 mole of an ideal diatomic gas is heated and compressed simultaneously from 300K, 1.0 atm to 400K and 5.0atm, the change in entropy is (Use `C_(P) = (7)/(2)R` for the gas)

A

`-20 JK^(-)`

B

`-5 JK^(-)`

C

`-15 JK^(-)`

D

`-2.8 JK^(-)`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta S = nC_(P) "ln" (T_(2))/(T_(1)) nR "ln" (P_(2))/(P_(1))`
`= 3 xx (7)/(2) R xx "ln" (5)/(1) = -15`
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