In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system:

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In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system:

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$q_{p}$ will be negative

$Δ_{r} H$ will be negative

$q_{p}$ will be positive

$Δ_{r} H$ will be positive

answer is A, B.

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Detailed Solution

In an exothermic reaction, heat is evolved, and system loses heat to the surrounding. For such system:

Heat of product $q_{p}$ will be negative while enthalpy change of reactants $Δ_{r} H$ will be negative.

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