A-LevelChemistryChemical energetics9701/12 · Feb/Mar 2017 · Q91 Mark
All the reactants and products of an exothermic reaction are gaseous. Which statement about this reaction is correct?
AThe total bond energy of the products is less than the total bond energy of the reactants, and ∆H for the reaction is negative.
BThe total bond energy of the products is less than the total bond energy of the reactants, and ∆H for the reaction is positive.
CThe total bond energy of the products is more than the total bond energy of the reactants, and ∆H for the reaction is negative.
DThe total bond energy of the products is more than the total bond energy of the reactants, and ∆H for the reaction is positive.
✓ Correct answer
C: The total bond energy of the products is more than the total bond energy of the reactants, and ∆H for the reaction is negative.
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