If total enthalpy of reactants and products is $H_{R}$ and $H_{P}$ respectively, then for exothermic reaction:

H_{R} = H_{P}

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H_{R} < H_{P}

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H_{R} > H_{P}

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H_{R} - H_{P} = 0

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Solution

The correct option is C $H_{R} > H_{P}$
An exothermic reaction is a reaction in which net energy is released during a reaction.

i.e, $Δ H = (enthalpy of products) - ( enthalpy of reactants) < 0$
=> $H_{P} - H_{R} < 0$
=> $H_{P} < H_{R}$
Hence, the answer is option $C$ .

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If total enthalpy of reactants & products is $H_{R}$ & $H_{P}$ respectively, then for exothermic reaction:

(\sum v_{p} Δ_{f} H (P) > \sum v_{R} Δ_{f} H (R))

H_{P} - H_{R} = + v e

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