Gce Model Questions Vol1 2022 Chemistry Question 33
Practice objective / multiple choice question 33 from the 2022 Gce Model Questions Vol1 Chemistry examination.
Using the average bond enthalpies (kJ mol\(^{-1}\)): \(\mathrm{H-H}=436\), \(\mathrm{Cl-Cl}=243\), \(\mathrm{H-Cl}=432\), \(\mathrm{O=O}=498\), \(\mathrm{O-H}=463\), \(\mathrm{Cl-O}=204\). (a) Calculate the enthalpy change \(\Delta H\) for the reaction \(\mathrm{H_2 + Cl_2 \rightarrow 2\,HCl}\). (b) Calculate \(\Delta H\) for the reaction \(\mathrm{H_2 + \tfrac{1}{2}O_2 \rightarrow H_2O}\). (c) Which reaction releases more energy per mole of \(\mathrm{H_2}\) consumed, and by how much (kJ mol\(^{-1}\))?
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This is Gce Model Questions Vol1 2022 Chemistry Question 33. It is one of the objective questions from the 2022 Gce Model Questions Vol1 Chemistry examination.
Difficulty level: Hard .
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