Energy

Question 1

What is an endothermic reaction?

Answer 1

A reaction in which heat is absorbed from the reactions surroundings which creates a TEMPERATURE DROP.

Question 2

Is exothermic bond making or bond breaking?

Answer 2

Exothermic is bond making because energy is absorbed to make bonds.

Question 3

Is endothermic bond making or bond breaking?

Answer 3

An endothermic reaction is bond breaking because it energy must be absorbed to break bonds.

Question 4

How can you tell if a reaction is exothermic?

Answer 4

A reaction is exothermic if a higher amount of energy is released when making the bonds than the amount if energy absorbed to break the bonds.

Question 5

How can you tell if a reaction is endothermic?

Answer 5

A reaction is endothermic if a higher amount of energy is absorbed to break bonds than the amount if energy released to make bonds.

Question 6

How do you work out energy released by a fuel in a reaction?

Answer 6

M x c x 🔼T

Question 7

How do you work out the energy released by a fuel per gram?

Answer 7

Mass of fuel burnt (g)

Question 8

What is an exothermic reaction?

Answer 8

A reaction in which energy is released to the reactions surroundings in the form of heat. This causes a TEMPERATURE RISE.