Energy

Question 1

What can the cup temperature experiment be used with?

Answer 1

Water and solids or neutralisation reactions

Question 2

How can you test for amount of energy released when a fuel burns?

Answer 2

Caliometry .eg. Heating water in a glass/container

Question 3

What can caliometry be used for?

Answer 3

Comparing energy released by fuels and food

Question 4

What two things happen in a reaction in terms of energy?

Answer 4

• Energy supplied to break bonds

- Energy supplied to create bonds

Question 5

What happens in an exothermic reaction in terms of energy?

Answer 5

Energy to form bonds > energy to break bonds

Question 6

What happens in an exothermic reaction in terms of heat?

Answer 6

Heat energy given out = rise in temp

Question 7

What happens in an endothermic reaction in terms of energy?

Answer 7

Energy to break bonds > energy to form bonds

Question 8

What happens in an endothermic reaction in terms of heat?

Answer 8

Heat taken in = fall in temperature

Question 9

How can you test energy transfer in a reaction?

Answer 9

Measure the temperature change of a solution when you mix the reactants in an insulated container