Energy changes

Question 1

What is exothermic reaction?

Answer 1

transfers energy from the reacting molecules into it’s surroundings.

Question 2

Give an example of an exothermic reaction…

Answer 2

combustion
oxidation reactions
neutralistion

Question 3

Describe the energy profile for exothermic reactions…

Answer 3

1) less energy in the products than the reactants

Question 4

What are the uses of exothermic reactions…

Answer 4

hand warmers
self-heating cans

Question 5

What is an endothermic reaction?

Answer 5

takes in energy from it’s surroundings.

Question 6

What happens to the temperature of the surroundings in an exothermic reaction?

Answer 6

decreases/ gets colder

Question 7

Describe the energy profile for endothermic reactions?

Answer 7

products have more energy than reactants

Question 8

What is the peak called on an energy profile?

Answer 8

activation energy

Question 9

In order for particles to collide what must they have?

Answer 9

sufficient amount of energy

Question 10

What is activation energy?

Answer 10

the minimum amount of energy particles must have in order to react.