Q.

Select the correct formula about the change in enthalpy.

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ΔrH=( Sum of enthalpies of reactants )−( sum of enthalpies of products)

ΔrH=( Sum of enthalpies of products )−( sum of enthalpies of reactants )

ΔrH=( Difference of enthalpies of products) − (Difference of enthalpies of reactants)

ΔrH=( Difference of enthalpies of reactants )−( Difference of enthalpies of products)

answer is 2.

(Detailed Solution Below)

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Detailed Solution

The enthalpy change of a chemical reaction is given by the symbol ΔrHΔrH= sum of enthalpies of products − sum of enthalpies of reactants =∑i aiHproducts −∑i biHreactants

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