What kind of a chemical reaction always releases energy?

Question

A. A reaction that converts two reactant molecules to one product molecule

B. A reaction that converts one reactant molecule to two product molecules

C. A reaction where the activation energy equals zero

D. A reaction in which the products have more energy than the reactants

E. A reaction in which the products have less energy than the reactants

Please help! i can't get this one! Thanks!!!!

Much Appreciated :D

Answer 1

B. A reaction that converts one reactant molecule to two product molecules

and

D. A reaction in which the products have more energy than the reactants

Answer 2

energy is released in a chemical reaction as heat or light and is called exothermic.  To release energy freely one must have excess energy and so a reaction where the products (ie the thing that is newly made) have less energy in themselves than the reactants (the things that reacted) then the difference in the energy is released as heat or light.  

Your answer will be E.

Answer 3

E). A reaction in which the products have less energy than the reactants.

Energywise you end up with something  which has less energy than you started with.