One mole of an ideal gas expanded freely and isothermally at `300 K` from `5` litres to `10` litres. If `DeltaE` is `0`, then `DeltaH` is
One mole of an ideal gas expanded freely and isothermally at `300 K` from `5` litres to `10` litres. If `DeltaE` is `0`, then `DeltaH` is
A. `5 cal`
B. `5xx300cal`
C. zero
D. `-2xx5xx300cal`
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