Which one in this reaction is endothermic and which one is exothermic : A + B + Heat ⇌ C + D + E ?

Question

Is heat being added in the reactants to form the products or are the reactants absorbing heat?

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Answer 1 · 2018-08-04T04:46:54

An exotherm results in the release of heat to the surroundings...

And this may be represented symbolically by...

#A+BrarrC+D+E + Delta#

And so, heat, i.e. #Delta#, is effectively one of the products of the reaction. On the other hand, an endotherm ABSORBS heat from the surroundings.

And so...

#A+B+ DeltararrC+D+E #

...is definitely endothermic...