Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define bond enthalpy.
π‘ Hint: Think about energy and bond breaking.
Question 2
Easy
What is the first step in estimating enthalpy changes using bond enthalpy?
π‘ Hint: Visual representation helps identify bonds.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is bond enthalpy?
- The energy needed to form a bond
- The energy needed to break a bond
- The energy released during a reaction
π‘ Hint: Think about the energy changes when bonds are created or broken.
Question 2
True or False: Bond enthalpies are constants for all molecules.
- True
- False
π‘ Hint: Consider how different contexts change energy requirements.
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Challenge Problems
Push your limits with challenges.
Question 1
Given the reaction: Nβ(g) + 3Hβ(g) β 2NHβ(g), estimate ΞH using bond enthalpies: Nβ‘N = 945 kJ/mol, H-H = 436 kJ/mol, N-H = 391 kJ/mol. Show all calculations.
π‘ Hint: Remember to keep track of what bonds are being broken and formed!
Question 2
Comparing C-O versus C-C bonds: Why do you think double bonds have higher enthalpies? Provide examples from diatomic and polyatomic molecules.
π‘ Hint: Think about how additional bonds change stability in molecules.
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