Here is the reaction-energy profile from Practice Problem 13.1 for the exothermic reaction A S B, for which ΔE_rxn = –40 kj/mol. What is ΔE_rxn for the reverse reaction A ← B?

Data from Problem 13.1

Consider this reaction-energy profile for the reaction A → B:

Is this reaction exothermic or endothermic?

Will the container in which this reaction is carried out feel hot or cold to the touch? Explain.

What is the value of ΔE_rxn (include the sign)?

What does the sign of ΔE_rxn tell you about this reaction?

Which contain more energy, the reactants or the products?

Does this reaction go uphill or downhill in energy?

Transcribed Image Text:

58 kJ/mol Energy 18 kJ/mol A Start Reaction coordinate B Finish