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5 mole of oxygen are heated at constant ...

5 mole of oxygen are heated at constant volume from `10^(@)C "to" 20^(@)C`. What will be the change in internal energy of the gas? Gram molar specific heat of gas at constant pressure `=8cal. "Mole"^(-1).^(@)C^(-1)` and `R=8.36J "mole"^(-1).^(@)C^(-1)`.

A

200 cal

B

300 cal

C

100 cal

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
B
Internal energy
`DeltaU=nC_v DeltaT=n(C_P-R)DeltaT`
`=5xx(8-(8.36)/(4.18))xx10=5xx6xx10 =300` cal
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