AQA GCSE 9-1 Chemistry- Energy Changes (Triple)

In an endothermic reaction the products have 

• more energy than the reactants
• less energy than the reactants
• the same energy as the reactants
• no energy

In an exothermic reaction the products have

• more energy than the reactants
• the same energy as the reactants
• less energy than the reactants
• no energy

What units are used to measure energy?

• Watts
• Newtons
• Joules
• kilowatts

If a chemical reaction is EXOTHERMIC, the temperature would....

• Stay the same
• Increase
• Decrease

If the energy required to break the bonds is greater than the energy given out by making new bonds the reaction is

• Exothermic

• Endothermic

• Neutralisation

If the energy required to break the bonds is less than the energy given out by making new bonds the reaction is

• Exothermic

• Endothermic

• Neutralisation

Is photosynthesis an exothermic or endothermic reaction?

• Endothermic
• Exothermic

What type of reaction in this?

• Exothermic

• Endothermic

Which process is exothermic?

• burning petrol in car engine

• cracking of petroleum fractions

• fractional distillation of petroleum

• melting bitumen for roads

The required energy to start a reaction is called...

• initiation energy

• starting energy

• activation energy

• key energy