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Five moles of hydrogen (gamma = 7//5), i...

Five moles of hydrogen `(gamma = 7//5)`, initially at `STP`, is compressed adiabatically so that its temperature becomes `400^(@)C`. The increase in the internal energy of the gas in kilojules is `(R = 8.30 J//mol-K)`

A

20.5

B

41.5

C

21.5

D

65.5

Text Solution

Verified by Experts

The correct Answer is:
B
`DeltaU=mc_(V)DeltaT`
`=5xx(5)/(2)xx8.3xx400`
`=5xx8.3xx10^(3)=41.5kJ`.
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