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

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

A

`Delta H = 0`

B

`Delta H = Delta U`

C

`Delta H lt Delta U`

D

`Delta H gt Delta U`

Text Solution

Verified by Experts

The correct Answer is:
C
For `N_(2) + 3H_(2) rarr 2NH_(3)`
`Delta n_(g) = 2 - (1 + 3) = -2`
`Delta H = Delta U + Delta n_(g) RT = Delta U - 2RT`
:. `Delta H lt Delta U`
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