本题目来源于试卷: What Drives Chemical Reactions D.2 Energy Cycles in Reactions，类别为 IB化学
[单选题]
Which statements about :dpf .p7vhdxc;:l 8jhaverage bond enthalpies are k6tg9- v6 r3mimd +gbwcorrect?
I.Average bond enthalpies are endothermic
II.Average bond enthalpies depend on the strength of the covalent bonds
III.Average bond enthalpies are unique to the covalent bonds in a specific compound
A. I and II only
B. I and III only
C. II and III only
D. I, II and III
参考答案: A
本题详细解析:
Energy is absorbed when breaking bonds (endothermic). The amount of energy required is dependent on the strength of the bond.
Statement III is incorrect because average bond enthalpies are averaged over a range of compounds.
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