Unit 6.7: Bond Enthalpies
Justify the sign of ∆H by comparing bond strengths of reactants and
products.
- How does stronger product bonding than reactants affect ∆H?
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Explain why breaking bonds requires energy and forming bonds releases
energy.
Calculate ∆H using bond energies and the equation ∆H = ∑[bonds broken] -
∑[bonds formed].
- Calculate ∆H for H2 + Cl2 → 2 HCl using bond energies.
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If bonds broken total 500 kJ and bonds formed total 600 kJ, what is
∆H?