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Heat of Reaction

Heat of Reaction. Found two ways: 1. Using heats of formation for the substances 2. Using bond energies for the compounds  Hrxn = Sum of ALL products – Sum of ALL reactants. 1. Heats of Formation. Calculate the  Hrxn for the following reaction:

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Heat of Reaction

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  1. Heat of Reaction • Found two ways: 1. Using heats of formation for the substances 2. Using bond energies for the compounds Hrxn = Sum of ALL products – Sum of ALL reactants

  2. 1. Heats of Formation Calculate the Hrxn for the following reaction: CH4(g) + 4F2(g)  CF4(g) + 4HF(g)

  3. 2. Bond Energies Calculate the energy change for the following reaction: NH3(g) + Cl2(g)  ClNH2(g) + HCl(g)

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