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AQA GCSE Chemistry Applications of Ξ”E

Applications of Ξ”E

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Experiments are used to determine enthalpy changes for reactions and combustion.

Measuring enthalpy change

Exothermic and endothermic reactions have multiple uses in everyday life as heat release or absorption can be useful.

Applications of Energy Changes

Chemical cells use a chemical reaction to produce voltage (electricity) with similar apparatus to electrolysis. These small cells can be connected to make a battery. Fuel cells (shown) provide a continous voltage when supplied with a constant supply of fuel and oxygen to produce electrical energy.

Chemical and fuel cells

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What is used to determine experiments to find enthalpy changes that can't be measured directly?

AQA GCSE Chemistry Applications of Ξ”E What is used to determine experiments to find enthalpy changes that can't be measured directly?
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Given that 2g of copper sulphate gives an energy change (Ξ”Q) of 1102.5J, what is the molar enthalpy change (Ξ”H) for the reaction from anhydrous copper sulphate to aquous copper sulphate?

AQA GCSE Chemistry Applications of Ξ”E Given that 2g of copper sulphate gives an energy change (Ξ”Q) of 1102.5J, what is the molar enthalpy change (Ξ”H) for the reaction from anhydrous copper sulphate to aquous copper sulphate?
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Instant ice packs can be used to treat sports injuries, do they use an endothermic or exothermic reaction?

AQA GCSE Chemistry Applications of Ξ”E Instant ice packs can be used to treat sports injuries, do they use an endothermic or exothermic reaction?
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Suggest another use for exothermic reactions in everyday life (e.g. combustion).

AQA GCSE Chemistry Applications of Ξ”E Suggest another use for exothermic reactions in everyday life (e.g. combustion).
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When cooking an egg is this an endothermic or exothermic reaction?

AQA GCSE Chemistry Applications of Ξ”E When cooking an egg is this an endothermic or exothermic reaction?
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Why do batteries go flat?

AQA GCSE Chemistry Applications of Ξ”E Why do batteries go flat?
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Why is electrical energy, not thermal energy, produced by fuel cells?

AQA GCSE Chemistry Applications of Ξ”E Why is electrical energy, not thermal energy, produced by fuel cells?
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Give one example of how hydrogen-oxygen fuel cells are particularly good for spacecrafts

AQA GCSE Chemistry Applications of Ξ”E Give one example of how hydrogen-oxygen fuel cells are particularly good for spacecrafts
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