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 sho )mpj q6 ky7bo*( jsuxve d+iddf05e) 5ws the enthalpy of the reactants and products of a reaction involving gaseous covalent compounds. exvd5(i se)d jfd5+0u Which 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 level thkb .+g)e ss)jm:0qmvsan the reactants meaning that the total average b)ve jg+m0)sm.q:k sbsond enthalpy of formation of bonds in the products is greater than the total average bond enthalpy of breaking of bonds in the reactants.
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