Practice Problem 5: Bond Enthalpies Estimate - 4.5 | Unit 5: Energetics and Thermochemistry | IB Grade 11: Chemistry
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Problem 5: Bond Enthalpies Estimate

4.5 - Problem 5: Bond Enthalpies Estimate

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Practice Questions

Test your understanding with targeted questions

Question 1 Easy

What is bond enthalpy?

💡 Hint: Remember it relates to the energy required for bond breaking.

Question 2 Easy

Is ΔH for an exothermic reaction positive or negative?

💡 Hint: Think about heat flow to the surroundings.

4 more questions available

Interactive Quizzes

Quick quizzes to reinforce your learning

Question 1

What is the bond enthalpy of a C≡C bond?

839 kJ
436 kJ
413 kJ

💡 Hint: Recall the bond enthalpy values discussed in class.

Question 2

An exothermic reaction results in a ΔH value that is:

True
False

💡 Hint: Think about energy transfer in reactions.

1 more question available

Challenge Problems

Push your limits with advanced challenges

Challenge 1 Hard

Estimate the enthalpy change for the reaction: 2 H₂(g) + O₂(g) → 2 H₂O(g) using average bond enthalpies.

💡 Hint: Remember to list the bonds broken and formed separately.

Challenge 2 Hard

Explain the significance of bond enthalpies in real-world applications, such as fuel combustion.

💡 Hint: Think about how different fuels have different energy releases upon burning.

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