Topic 5 – Energy changes

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...

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...