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 enthalpy diagram b pc5nnl +/tg ft; ,+lc*rknqyhvm0 d6,elo r3d/.in;q sj9c xvj4fw shows that:
A. The reactants are more stable than the products and ΔH is positive
B. The products are more stable than the reactants and ΔH is positive
C. The reactants are more stable than the products andΔH is negative
D. The products are more stable than the reactants and ΔH is negative
参考答案: A
本题详细解析:
The reactants are at a *s3 jaul x;g(6 zav1bslower energy level to the products and are therefore more stable. Thz asu6jgs ;1 3l(xb*ave products are at a higher energy level to the products meaning the enthalpy change is positive (endothermic reaction).
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