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Intros
Lessons
  1. Enthalpy changes
  2. Exothermic and Endothermic reactions
  3. Mean bond enthalpy and other enthalpy definitions.
  4. Representing enthalpy changes.
  5. Ways to find the enthalpy change.
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Examples
Lessons
  1. Recall how to represent the enthalpy change of a reaction.
    The reaction between fluorine gas, F2 and hydrogen gas, H2 is as follows. The enthalpy change of the reaction is -539 kJ/mol:

    H2(g)+F2(g)2HF(g) \mathrm{H_{2(g)} + F_{2(g)} \to 2HF_{(g)}}

    1. i) How can the enthalpy change, ΔH, of the reaction be shown in a reaction equation?
      ii) Name one way in which the enthalpy of reaction could be measured.
    2. How could this enthalpy change be shown on an energy diagram?