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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the bond enthalpy of a C–H bond?
💡 Hint: Look in a reference table for average bond enthalpies.
Question 2
Easy
Define an exothermic reaction.
💡 Hint: Think about whether energy is entering or leaving the system.
Practice 4 more questions and get performance evaluation
Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does bond enthalpy measure?
- Energy needed to create a bond
- Energy needed to break a bond
- Energy released in a reaction
💡 Hint: Consider the energy dynamics during the bond formation and breaking.
Question 2
True or False: An exothermic reaction has a positive ΔH.
- True
- False
💡 Hint: Recall how heat is exchanged in exothermic and endothermic reactions.
Solve 2 more questions and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Estimate the reaction enthalpy for the dehydration of alcohols using bond enthalpies. An alcohol like C₂H₅OH forms ethylene (C₂H₄) and water (H₂O). Calculate ΔH based on the bonds involved.
💡 Hint: Focus on breaking the C–O bond and forming double bonds in C₂H₄.
Question 2
Discuss how bond enthalpies vary in a different phase and how that affects ΔH estimations for reactions that involve liquid and gaseous states.
💡 Hint: Consider what happens when water transitions from liquid to gas.
Challenge and get performance evaluation