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If Delta H is the change in enthalpy and...

If `Delta H` is the change in enthalpy and `Delta E` is the change in internal energy accompanying a gaseous reaction then

A

`Delta H` is always greater than `Delta U`

B

`Delta H gt Delta U` only the number of moles of the reactnts is greater than the number of mole of products

C

`Delta H` is always less than `Delta U`

D

`Delta H lt Delta U` only if the number of moles of products is less than the number of moles of reactants.

Text Solution

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The correct Answer is:
D
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Knowledge Check

  • If q is the heat added to the system, w is the work done by the system and Delta U is the change in internal energy, then according to first law of thermodynamics :

    A
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    B
    `Delta U = q - w`
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    D
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    B
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    C
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    D
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    A
    `DeltaH` and `DeltaS` are both negative
    B
    `DeltaH` is negative and `DeltaS` is positive
    C
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