What Drives Chemical Reactions D.2 Energy Cycles in Reactions (id: f8feb05f3)

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]
The following diagram shows the enthalpy of 13nz4ziyi y mw/4o9 uathe reactants and pr9(bug7sl5,pu6zz yk p5 qnb z9oducts of a reaction involving gaseous covalent compounds. Which statement is cq u(, l976b5kpsz5zg9ybupznorrect?

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 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 bonds in the reactants.

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