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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What is the standard enthalpy of combustion (ΔH_c°)?
💡 Hint: It relates to heat released during burning.
Question 2
Easy
Is ΔH_c° positive or negative in combustion reactions?
💡 Hint: Think about heat release.
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 is ΔH_c° for combustion reactions?
- Positive
- Negative
- Zero
💡 Hint: Recall that exothermic means heat exit.
Question 2
True or False: The enthalpy of combustion can be positive.
- True
- False
💡 Hint: All combustions release energy, remember that!
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the ΔH_c° for the complete combustion of 3 moles of octane (C8H18) if it releases -11400 kJ.
💡 Hint: Divide total energy by number of moles.
Question 2
An experiment shows that the combustion of 0.5 moles of a substance releases -650 kJ. Discuss how this value compares to values for other fuels like methane and propane.
💡 Hint: Relate energy values to determine effectiveness.
Challenge and get performance evaluation