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Find DeltaG (J//"mol") for the reaction ...

Find DeltaG `(J//"mol")` for the reaction at `300 kPa` and `27^(@)C` when all gases are in stoichimetric ratio of moles. `N_(2)O_(4)(g)rarr2NO_(2)(g)` `[ln 2=0.7]`
Given : `DeltaG_(f)^(@)(N_(2)O_(4))=100"kJ/mol"`
`DeltaG_(f)^(@)(NO_(2))=50"kJ/mol"`
`R=8"J/mol"-K`

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