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 o hyv(ai-)h r)2ccibcu n7oc/0f the reacta -a1uour;7 * b; nmtkemnts and products of a reaction involvi ;;bo*e um7r-utmn1 ak ng gaseous covalent compounds. 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 qyu ys 4zwie:2/ u-a.ja lower energy level than the reactants meaning that the total average bond enthalpy of formation of bonds in the products is greater than the total average bond enthalpy of breaking of bsywu2ayu:.iqz / je -4onds in the reactants.
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