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)`.

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