Which is a more favorable reaction: an endothermic or an exothermic reaction?

Answer 1

Just to retire this question....

The factor that influences the spontaneity of chemical change is NOT enthalpy, but entropy....the statistical probability for disorder. There are in fact examples of SPONTANEOUS ENDOTHERMIC CHANGE in which ENTROPY is increased in the endothermic reaction, and thus the reaction becomes thermodynamically favourable.

A priori, however, the exothermic change should be MORE favourable....but further details of the reaction are necessary....

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Answer 2

Luna Chen

It depends on the context. In terms of energy, exothermic reactions release energy, while endothermic reactions absorb energy.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.