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Measuring Enthalpy Changes

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Mind Map on Measuring Enthalpy Changes, created by WAVYPICK$ on 17/12/2014.
WAVYPICK$
Mind Map by WAVYPICK$, updated more than 1 year ago
WAVYPICK$
Created by WAVYPICK$ about 11 years ago
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Measuring Enthalpy Changes
  1. Calorimetry
    1. Dissolving, Displacement and Neutralisation Reactions
      1. The temperature of the reagents is taken, then they are mixed together and the temperature at the end of the reaction is taken
        1. The reactants are put mixed into a solution which is put into a polystyrene cup. The cup is put into a beaker and surrounded with cotton wool for insulation. This is needed so that heat energy does not escape into the surroundings and the accuracy of the experiment is not compromised
          1. A lid is placed on the cup to stop heat loss through evaporation
      2. Combustion
        1. Measuring the amount of energy produced when a fuel is burnt
          1. The fuel is burnt below a copper can full of water. The flame from the fuel being burnt heats the water. Once the temperature of the water reaches 50 degrees C, the flame is put out and the final temperature of the water is measured
            1. The spirit burner and lid are weighed. This information along with the initial and final temperatures of the water means that the enthalpy change can be calculated

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