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Internal energy of two moles of an ideal...

Internal energy of two moles of an ideal gas at a temperature of `127^(@)C is 1200R`. Then find the molar specific heat of the gas at constant pressure?

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The correct Answer is:
`2.5R`
`U = 1200R = nCvT`
`1200R = 2 Cv xx 400`
`C_(V) = (3)/(2)R :. C_(P) = R +(3)/(2)R = 2.5 R`
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