What Drives Chemical Reactions D.2 Energy Cycles in Reactions (id: 7e5ae8620)

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]
Given the enthalpy cpgd92 gp7 uvkxoi-/dc;j) y.ehhhq sj)c .xydl2 ,9jm,anges for the reactions below.
$\frac{1}{2}$$N_2$(g)+$O_2$(g)→$NO_2$(g); ΔH=+33.9kJ
$NO$(g)+$\frac{1}{2}$$O_2$(g)→$NO_2$(g); ΔH=-56.5kJ
What will be the enthalpy change for:
$\frac{1}{2}$$N_2$(g)+$\frac{1}{2}$$O_2$(g)→$NO$(g)?

A. -22.6kJ
B. -90.4kj
C. +90.4kj
D. +22.6kj


参考答案:  C


本题详细解析:

微信扫一扫，分享更方便