这虽然是从原文书上看来的 但应该是高中的观念吧! 原文如下： Branched alkanes actully give off less heat......(中略) 有支链的alkanes 燃烧热比较小这点我没有问题 Branched isomers of an alkane are more stable than unbrached ones. 但为什麽燃烧热小会比较稳定? 不是燃烧热小比较容易燃烧吗? 还是我想错了....... A compound that is more stable has lower heat of combution and will give off less heat than a less stable isomer. 以上.....麻烦板上高手了@@" --

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