Topic 5 – Energy changes

Chemical cells and fuel cells (chemistry only)

5.2.1 Cells and batteries Cells – chemical react → produce electricity Voltage produced depend on type of electrode & electrolyte Simple cell – connect 2 different metals in contact with electrolyte Batteries – 2+ cells connected in series to provide greater...

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Exothermic and endothermic reactions

5.1.1 Energy transfer during exothermic and endothermic reactions 5.1.2 Reaction profiles 5.1.3 The energy change of reactions (HT only) Exothermic Eg thermal decomposition, citric acid + NaHCO3 Take in energy from surroundings Temp ↓ Products more energy than...

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