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Enthalpy change equals internal energy c...

Enthalpy change equals internal energy change for a chemical reaction when

A

All the reactants and products are in solution

B

Reaction is carried out in a closed vessel

C

Number of moles of gaseous reactants and that of products is equal

D

Reaction is carried out at constant pressure

Text Solution

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In A volume change is negliable while in (B) and (C), there is no volume change.
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