5 moles of gas were heated from 100^(@)C...

5 moles of gas were heated from `100^(@)C` to `120^(@)C` at constant volume. The internal energy was changed by 200 J. what is the specific heat capacity of the gas?

`"5 J mole"^(-1) K^(-1)`

`"4 J mole"^(-1) K^(-1)`

`"2 J mole"^(-1) K^(-1)`

`"1 J mole"^(-1) K^(-1)`

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