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I'm looking at a question with a passage that contains the heats of hydrogenation of various alkenes, ranging from least to most substituted. The numbers become progressively less negative.
One question asks that "The greatest amount of energy is released by the oxidative cleavage of an alkene that is:"
The answer was unsubstituted
Another question asks, "The greatest amount of energy is required to break which of the following carbon carbon bonds?""
And the answer was the fully substituted alkene.
First of all, what do the values in the table mean? Why are they negative? Is that the energy that must be absorbed by the bond to break it?
How can the unsubstituted alkene release the most energy but the fully substituted require the most energy?
One question asks that "The greatest amount of energy is released by the oxidative cleavage of an alkene that is:"
The answer was unsubstituted
Another question asks, "The greatest amount of energy is required to break which of the following carbon carbon bonds?""
And the answer was the fully substituted alkene.
First of all, what do the values in the table mean? Why are they negative? Is that the energy that must be absorbed by the bond to break it?
How can the unsubstituted alkene release the most energy but the fully substituted require the most energy?