Energy changes

Which reactions take in energy from their surroundings?

• Exothermic

• Endothermic

• Displacement

Which of these use endothermic reactions?

• Self heating can

• Ice packs for injuries

• Handwarmers

What is an exothermic reaction?

• A reaction that takes in energy from its surroundings

• A reaction that gets cold

• A reaction that releases energy

Which of these is an example of an endothermic reaction?

• combustion

• photosynthesis

• respiration

• displacment

Which of these is an example of an exothermic reaction?

• Combustion

• Photosynthesis

• Thermal decomposition

What does combustion mean?

• fire

• burning

• reduction

What is activation energy?

• The energy taken in during a reaction

• The energy given out during a reaction

• The amount of energy required to get a reaction started

During chemical reactions a new substance is made

• True

• False

During a chemical bonds are broken and new bonds are formed.

• True

• False

magnesium+ copper sulfate ≻ Magnesium sulfate + copper

What type of reaction is this?

• Endothermic

• Combustion

• Displacement

• Neutralisation