C7 Energy Changed

Question 1

What is an exothermic reaction

Answer 1

A reaction that releases heat

Question 2

What are 2 examples of an exothermic reaction

Answer 2

Neutralisation and combustion

Question 3

What is an endothermic reaction

Answer 3

A reaction that takes in heat

Question 4

2 examples of an endothermic reaction

Answer 4

Electrolysis and first stages of photosynthesis

Question 5

What is the “law of conversation of energy”

Answer 5

1) changes in heat content being measured with a thermometer
2) the overall all amount of energy does not change but conserved

Question 6

What is activation energy

Answer 6

The minimum amount of energy required for a collision to be successful

Question 7

What is an energy profile

Answer 7

Graphical representations of the energy and progress of reaction of a reaction

Question 8

What is bond breaking and bond making. endothermic or exothermic

Answer 8

Bond breaking is endothermic
Bond making is exothermic

Question 9

Why for an energy profile for an endothermic reaction, is the product higher then the reactant

Answer 9

The products have more energy then the reactant