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Consider the reaction, N(2) + 3H(2) rarr...

Consider the reaction, `N_(2) + 3H_(2) rarr 2NH_(3)` carried out at constant temperature and pressure. If `Delta H and Delta U` are the enthalpy and internal energy changes for the reaction, which of the following expressions is true?

A

`DeltahgtDeltaU`

B

`DeltaHltDeltaU`

C

`DeltaH=DeltaU`

D

`DeltaH=0`

Text Solution

Verified by Experts

The correct Answer is:
B
For `N_(2)+3H_(2)to2NH_(3),Deltan_(g)=2-4=-2`
`DeltaH=DeltaU+DeltanRT`
Now `DeltaH=DeltaU-2RT` or `DeltaU=DeltaH+2RT`
`:.DeltaUgtDeltaH`
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