1.

If one mole of ammonia and one mole of hydrogen chloride are mixed in a closed container to form ammonium chloride gas , then

Answer»

`DeltaHltDeltaU`
there is no relationship
`DeltaHgtDeltaU`
`DeltaH=DeltaU`

Solution :`NH_(3(G))+HCl_((g))toNH_(4)Cl_((g))`
`DELTAN=` no . Ofmoles of product - no of moles of REACTANT
`=1-2`
`Deltan=1`
Now , `DeltaH=DeltaE+DeltanRT`
`DeltaH=DeltaE-RTorDeltaE=DeltaH+RT`
`thereforeDeltaEgtDeltaH(DeltaE=DeltaU)`=change in internal energy.


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