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Calculate charge in interanl energy of 1...

Calculate charge in interanl energy of 10 gm of `H_(2)`,when it's state id charge from `(300k,1 Atm)` to
`(500K,2 Atm)`

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For ideal gas
`DeltaU=nC_(V)(T_(2)-T_(1))=((10)/(2))((5)/(2)R)(500-300)=2500R=5Kcal`
`C_(V)` for `H_(2)` (diatomic) in low temperature range will be 5R as vibrational part is not included.
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