ENERGY CHANGES

Answer 1

An exothermic reaction is one that transfers energy to the surroundings so the temperature of the surroundings increases.

Question 2

Example of Exothermic reactions

Answer 2

Everyday uses of exothermic reactions include self-heating cans and hand warmers.

Answer 3

An endothermic reaction is one that takes in energy from the surroundings so the temperature of the surroundings decreases

Question 4

Activation energy

Answer 4

The minimum amount of energy that particles must have to react.

Question 5

REACTION PROFILE

Answer 6

In an exothermic reaction, the energy released from forming new bonds is greater than the energy needed to break existing bonds.

Answer 7

In an endothermic reaction, the energy needed to break existing bonds is greater than the energy released from forming new bonds.