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The textbook states that enthalpies of fusion and vaporization are always positive and I’m pretty sure the same goes for the enthalpy of sublimation (since it’s the conversion of a solid to vapor so it’s endothermic)
In response to this question, could anyone explain why the bond enthalpies in Dr. Lavelle's example were positive AND negative?
Bond energy can be described as the energy it takes to break a bond, in this case, the values would be positive.
Therefore, the energy it takes to form bonds would be negative.
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