AP Chemistry Quiz
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THERMOCHEMISTRY
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Use the average bond enthalpies given to estimate ΔH\Delta H for the reaction: H2(g)+Cl2(g)→2HCl(g)\mathrm{H_2(g) + Cl_2(g) \rightarrow 2HCl(g)}. Bond enthalpies: H−H=436 kJ/mol\mathrm{H-H}=436\ \text{kJ/mol}, Cl−Cl=243 kJ/mol\mathrm{Cl-Cl}=243\ \text{kJ/mol}, H−Cl=431 kJ/mol\mathrm{H-Cl}=431\ \text{kJ/mol}. What is the estimated enthalpy change, ΔH\Delta H, for the reaction?
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