Molecules must (absorb, liberate) energy to break theirbonds and (absorb, liberate) energy when their bonds arereformed.

Chemistry for Engineering Students
4th Edition
ISBN:9781337398909
Author:Lawrence S. Brown, Tom Holme
Publisher:Lawrence S. Brown, Tom Holme
Chapter9: Energy And Chemistry
Section: Chapter Questions
Problem 9.77PAE: 9.77 When a reaction is exothermic, is the sum of bond energies of products or of reactants greater?
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Molecules must (absorb, liberate) energy to break their
bonds and (absorb, liberate) energy when their bonds are
reformed.

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