Energy changes?

Question

What 2 kinds of energy changes can occur during a chemical reaction? Describe.

Are they endothermic & exothermic? Thanks.

Answer 1

Yes, they are endo and exothermic.

The basic concept is as follows:

All compounds contain energy in their bonds. When they react, new products are formed. If the new products contain less energy than before, the extra energy is released to the surroundings, usually as heat. This is exothermic. If the products need more energy in the bonds than was available before, the reaction must take that extra energy from the surroundings. This is endothermic.

Answer 2

yes they can be both,it depends what kind of reaction it is is;basically endothermic is when the energy is needed to break up the bond remember something that need to to happen to take place.
e.g doing the reaction of colorizes think about what type of the reaction does it occur.