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For the reaction N(2)(g) + 3H(2)(g) hA...

For the reaction
`N_(2)(g) + 3H_(2)(g) hArr 2NH_(3)(g), DeltaH=?`

A

`DeltaE+2RT`

B

`DeltaE-2RT`

C

`DeltaH=RT`

D

`DeltaE-RT`

Text Solution

Verified by Experts

The correct Answer is:
B
According to enthalpy equation
`underset("change")underset("Enthalpy")(DeltaH)=underset("energy")underset("Internal")+ Deltan_(g) RT`
`Deltan=2-(1+3)`
`[Deltan=underset("mole")underset("Product")(n_(p)) -underset("mole")underset("Reactant")(n_(R))]`
`=2-4=-2`
`therefore DeltaH=DeltaE+(-2)RT`
`DeltaH=DeltaE-2RT`
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