Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is bond enthalpy?
π‘ Hint: Think about the energy required to disrupt chemical connections.
Question 2
Easy
In an exothermic reaction, what happens to energy?
π‘ Hint: Relate to the temperature change observed.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What is the bond enthalpy of a C-H bond approximately?
- 414 kJ/mol
- 498 kJ/mol
- 963 kJ/mol
π‘ Hint: Recall the values for common bonds.
Question 2
True or False: Bond enthalpy values are exact for every molecule.
- True
- False
π‘ Hint: Think about the variation in chemical environments.
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Challenge Problems
Push your limits with challenges.
Question 1
Predict the enthalpy change for the reaction: C2H4(g) + H2(g) β C2H6(g). Given: C=C = 612 kJ/mol, C-H = 414 kJ/mol. Calculate using bond enthalpies.
π‘ Hint: Set up your energy values carefully and watch your signs!
Question 2
Discuss how factors like bond order influence reactions with an example, particularly focusing on C-H vs C=C bonds in terms of stability and energy.
π‘ Hint: Consider the physical attributes of the bonds when constructing your example.
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