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Calculate the `DeltaH` for the isothermal reversible expansion of `1` mole of an ideal gas from initial pressure of `0.1 bar` at a constant temperatur

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Calculate the `DeltaH` for the isothermal reversible expansion of `1` mole of an ideal gas from initial pressure of `0.1 bar` at a constant temperature at `273K`.
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`P_(1)V_(1)=P_(2)V_(2)` or `PV`=const.
(at constant temperature)
Thus, `DeltaH=DeltaU+Delta(PV)`
`implies DeltaH=0`
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