4.3.1 - Estimating Enthalpy Changes using Bond Enthalpies
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Practice Questions
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Define bond enthalpy.
💡 Hint: Think about energy and bond breaking.
What is the first step in estimating enthalpy changes using bond enthalpy?
💡 Hint: Visual representation helps identify bonds.
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Interactive Quizzes
Quick quizzes to reinforce your learning
What is bond enthalpy?
💡 Hint: Think about the energy changes when bonds are created or broken.
True or False: Bond enthalpies are constants for all molecules.
💡 Hint: Consider how different contexts change energy requirements.
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Challenge Problems
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Given the reaction: N₂(g) + 3H₂(g) → 2NH₃(g), estimate ΔH using bond enthalpies: N≡N = 945 kJ/mol, H-H = 436 kJ/mol, N-H = 391 kJ/mol. Show all calculations.
💡 Hint: Remember to keep track of what bonds are being broken and formed!
Comparing C-O versus C-C bonds: Why do you think double bonds have higher enthalpies? Provide examples from diatomic and polyatomic molecules.
💡 Hint: Think about how additional bonds change stability in molecules.
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