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# Check Science Question

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Which of the following is true of an exothermic reaction?

A) The enthalpy of the products is greater than that of the reactants.

B) The enthalpies of the reactants and the products are equal.

C)The enthalpy of the reactants is greater than that of the products.

i think it is C?

Apr 8, 2019
edited by jjennylove  Apr 8, 2019
edited by jjennylove  Apr 8, 2019

#1
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im sorry i forgot to post this on offtopic

Apr 8, 2019
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The ΔH is a positive change in endothermic reactions, and negative in heat-releasing exothermic processes.

ΔH is change in enthalpy = Hf-Hi     For this to be NEGATIVE  Hi must be greater than Hf   so 'C'

Apr 8, 2019
edited by ElectricPavlov  Apr 8, 2019
#3
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Hi must be greater than Hf ? Do you mean products must be less than products? So C, "The enthalpy of the reactants is greater than that of the products" ?

jjennylove  Apr 8, 2019
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Convention dictates the   'i' = iitial    'f' = final   in a lot of chemical, physics etc equations

ElectricPavlov  Apr 8, 2019