What Drives Chemical Reactions D.2 Energy Cycles in Reactions (id: d73398ceb)

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]
Cracking is a process by whiv s.0wx t:mehz:*y,a :mli ,xach gaseous w.5ls6/ca,n fe:vyb2trs ya 6 wtya07alkanes are converted to smaller-chain alkanes and alkeneys6l/bfw : yea2 varyn0wc6,7s. tta5 s. One possible reaction in the cracking of butane is shown.


What is the enthalpy change of the cracking reaction?

A. +80kJ mol$^{-1}$
B. +150kJ mol$^{-1}$
C. -80kJ mol$^{-1}$
D. -150kJ mol$^{-1}$


参考答案:  A


本题详细解析:

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