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3 cards from this section. Quick, good the night before a test.
What is bond enthalpy?
Think about the process of breaking bonds.
Define bond dissociation enthalpy.
Focus on energy changes associated with breaking bonds.
What does bond enthalpy measure?
Consider the energy flow during bond breaking.
True or False: Mean bond enthalpy is an average of bond energies across similar types.
Think of how average values work in real life.
Calculate the overall bond enthalpy change for the reaction 2 H2(g) + O2(g) → 2 H2O(g). Use given bond enthalpies for H-H = 436 kJ/mol and O=O = 498 kJ/mol.
Remember to sum bond energies carefully.
Discuss how increasing temperature affects the bond enthalpy values and the overall reaction energies.
Consider how temperature relates to molecular motion.
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