Is this reaction endothermic or exothermic?

AB ---> A+B

a. Exothermic, ΔH rxn is positive.

b. Endothermic, Delta ΔH rxn is negative.

c. Endothermic, ΔH rxn is positive.

1 answer

Exothermic reactions dH is -
Endothermic reactions dH is +
I would expect this reaction to be endothermic since you are breaking the AB bond and not forming bonds on the product side.