本题目来源于试卷: What Drives Chemical Reactions D.1 Measuring Enthalpy Changes，类别为 IB化学
[单选题]
The following diagram shows the enthalpy of the react r6k n 2+(h/h3nn ff0yt ray:yhants and products of a re y8wkz+aowl+0action involving gaseous covalent compounds. Whic w8+0a+zkwyol h statement is correct?
A. The reactants have a higher total average bond enthalpy than the products
B. The products have a higher total average bond enthalpy than the reactants
C. The activation energy is the sum of the total bond enthalpies for the products and reactants
D. The activation energy is the difference between the total bond enthalpies for the products and reactants
参考答案: B
本题详细解析:
The products are at a lower energy uh.: ,num+tkwj.sst/level than the reactants meaning that the total average bond enthalpy of formation of bonds in the products is greater than the total avemtn.u:jkt/ swu+ , sh.rage bond enthalpy of breaking of bonds in the reactants.
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