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If DeltaH is the change in enthylpy and ...

If `DeltaH` is the change in enthylpy and `DeltaU`, the change in internal energy accompanying a gaseous reactant then

A

`DeltaH` is always greater than `DeltaE`

B

`DeltaH lt DeltaE` only if the number of moles of the products is greater than the number of the reactants

C

`DeltaH` is always less than `DeltaE`

D

`DeltaH lt DeltaE` only if the number of moles of the products is less than number of moles of the reactants

Text Solution

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The correct Answer is:
D
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If Delta H is the change in enthalpy and Delta U the change in internal energy accompanying a gaseous reaction (A) Delta H is always greater than Delta U (B) Delta H < Delta U only if the number of moles of the products is greater than the number of the reactants (C) Delta H is always less than Delta U (D) Delta H < Delta U only if the number of moles of the products is less than the number of the reactants

If DeltaH is the enthalpy change and DeltaU the change in internal energy accompanying a gaseous reaction, then

Knowledge Check

  • If DeltaH is the change in enthalpy and DeltaE , the change in internal energy accompanying a gaseous reaction, then:

    A
    `DeltaH` is always greater than `DeltaE`
    B
    `DeltaH lt DeltaE` only if the number of moles of the products is greater than the number of moles of the reactants.
    C
    `DeltaH` is always less than `DeltaE`
    D
    `DeltaH lt DeltaE` only if the number of moles of products is less than the number of moles of the reactants.

  • If DeltaH is the change in enthalpy and DeltaE , the change in internal energy accompanying a gaseous reaction, then

    A
    `DeltaH` is always greater than `DeltaE`
    B
    `Delta H lt DeltH` only if the number of moles of the products is greater than the number of moles of the reactants
    C
    `DeltaH` is always less than `DeltaE`
    D
    `Delta H lt Delta E` only if the number of moles of products is less than the number of moles of the reactants

  • If DeltaH is the enthalpy change and DeltaE the change in internal energy accompanying a gaseous reaction then

    A
    `DeltaH` is always less than `DeltaE`
    B
    `DeltaH` is always greater than `DeltaE`
    C
    `DeltaH` is less than `DeltaE` if the number of gaseous products is greater than the number of moles of gaseous reactants.
    D
    `DeltaH` is less than `DeltaE` if the number of moles of gaseous products is less than the number of moles of gaseous reactants.

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    The change in the internal energy of a substance

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