The relative amounts of energy released when substances burn can be measured bysimple calorimetry, eg by heating water in a glass or metal container.
This is the equation used the calculate the energy released Q = mcΔT
Energy is normally measured in Joules (J)
Energy values could be given in kJ or calories for a given mass or amount of substance
The energy released or absorbed by a chemical reaction in a solution can be calculated from the measured temperature change of the solution when the reactants are mixed in an insulated container
- This method can be used for reactions of solids with water or for neutralisation reactions
1. Cold water is measured into a copper calorimeter - a small metal can
2. The starting temperature of the water is recorded