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One mole of an ideal gas at 27^@C expand...

One mole of an ideal gas at `27^@C` expanded isothermally from an initial volume of `1 ` litre to `10` litre. The `DeltaU` for this process is : `(R=2 cal K^(-1) mol^(-1))`

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For isothermal process, `DeltaU =0`
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