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The enthalpy change (DeltaH) for the rea...

The enthalpy change `(DeltaH)` for the reaction, `NH_(2(g))+3H_(2(g)) rarr 2NH_(3g)` is `-92.38kJ` at `298K` What is `DeltaU` at `298K ?`

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`N_(2(g))+3H_(2(g))rarr2NH_(3(g))`
`DeltaH=-92.38kJ at 298 K, DeltaU=?`
`DeltaH=DeltaU+DeltanRT`
`Deltan=2-(3+1)=-2`
`:. -92.38xx10^(3)DeltaU+(-2)xx8.314xx298`
`:. DeltaU=-87424J` ltbr. `=-87.425kJ`
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