C7 Energy Changes GCSE

Name an advantage of using a fuel cell

• Makes carbon dioxide

• Can be charged anywhere

• Only produces water

• Safe to use with hydrogen gas

How do you make a 9V battery using 1.5 V cells?

• Put 6 cells in parallel

• Put 14 cells in series

• Put 6 cells in series

• Use 6 cells

Why do non-rechargeable cells stop producing electricity?

• They become flat

• One of the reactants runs out

• Reaction stops because none of the reactants runs out

• Reaction stops because one of the reactants runs out

Why can a rechargeable battery be recharged?

• Reaction is reversible

• Reaction is irreversible

• External power supply attached

• Battery can be charged back up again

Give two factors that affect the voltage of a cell?

• type of electrode

• temperature

• gas produced

• current

What type of energy is produced by hydrogen fuel cells?

• Heat

• Electrical

• Light

• Chemical

What 2 reasons might the government use to produce more hydrogen filling stations?

• using hydrogen only produces water

• using hydrogen saves crude oil

• hydrogen is renewable

• producing fuel cells does not make any greenhouse gases

Identify as many factors as possible related to using hydrogen fuel cells

• Only produces water

• A fuel cell does not need to be recharged

• Hydrogen is made from non-renewable fossil fuels

• Hydrogen is explosive

• Hydrogen is difficult to store as it is a gas

Identify as many factors as possible related to using Li-ion batteries in cars?

• No emissions are produced

• Li-ion batteries can catch fire

• Li-ion batteries may release toxic chemicals on disposal

• Li-ion batteries have a finite life as they are not rechargeable

Which one is a use for an endothermic reaction?

• Sports injury pack

• Hand warmer

• Self heating can

• Rusting