Measuring Enthalpy Changes

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Calorimetry – Dissolving, Displacement and Neutralisation Reactions

To measure the amount of energy transferred in these reactions (in solution), take the temperature of the reagents (making sure they’re the same), mix them together and measure the temperature of the solution at the end of the reaction

1)     If you want to investigate the enthalpy change of dissolving, displacement or neutralisation reactions, you can do it by mixing the reactants in a polystyrene cup

 2)     The biggest problem with energy measurements is the amount of energy lost to the surroundings

3)     You can reduce it by putting the polystyrene cup into a beaker of cotton wool to give more insulation, and to put a lid on the cup to reduce energy lost by evaporation




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