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For gaseous reactions, if DeltaH is the ...

For gaseous reactions, if `DeltaH` is the change in enthalpy and `DeltaU` that in internal energy then:

A

`DeltaH` is always greater than `DeltaU`

B

`DeltaH` is always less than `DeltaU`

C

`DeltaH lt DeltaU` only if the number of mole of the products is less than that of the reactants.

D

`DeltaU lt DeltaH` only if the number of mole of the reactants is less than that of the products.

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The correct Answer is:
C, D
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