Draw reaction energy profiles for the reactions in Practice Problems 13 8 and 13 9 For both, label the gap that is E rxn Data from Problem 13 8 Consider the reaction A 2 B 2 2 AB Breaking 1 mole of AA bonds and 1 mole of BB bonds requires 2200 kJ Forming 1 mole of AB bonds releases 1000 kJ Is this ...

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Draw reaction-energy profiles for the reactions in Practice Problems 13.8 and 13.9. For both, label the gap

Question:

Draw reaction-energy profiles for the reactions in Practice Problems 13.8 and 13.9. For both, label the gap that is ΔE_rxn.

Data from Problem 13.8

Consider the reaction A₂ + B₂ → 2 AB. Breaking 1 mole of A—A bonds and 1 mole of B—B bonds requires 2200 kJ. Forming 1 mole of A—B bonds releases 1000 kJ.

Is this reaction exothermic or endothermic? Explain.

What is the value of ΔE_rxn? (Get the sign right.) How is it to be interpreted?

Data from Problem 13.9

Consider the reaction A₂ + B₂ → 2 AB, for which ΔE_rxn = –100 kJ. Forming 1 mole of A—B bonds releases 150 kJ. How much energy does it take to break the reactant bonds?