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 ent 5 n8zl pk 7viv5gz9p0-t (x2qapslqu8 /vxj;mn yb9xv o w;z;uamd1 :6ys )o)ohalpy of the reactants and products of a reaction invol d9zoxxm;)wvjb oo;)m1yuv yn6s;a :/ving 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 a lower energy level than the reactants meaningg9jd2wkrjs3v r t.76dyv2tw)7 :qap o that the total average bond enthalpy of formation of bonds in the prodsqow:)p2 r dtt9vwa6j7 gvy 23kdjr 7.ucts is greater than the total average bond enthalpy of breaking of bonds in the reactants.
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