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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
Define an exothermic reaction.
💡 Hint: Think about what happens when something burns.
Question 2
Easy
What is activation energy?
💡 Hint: Consider the energy needed to kickstart a reaction.
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 type of reaction absorbs energy?
- Exothermic
- Endothermic
- Both
💡 Hint: Think of photosynthesis.
Question 2
True or False: Exothermic reactions have a positive enthalpy change (ΔH).
- True
- False
💡 Hint: Recall the definition of exothermic.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
A chemical reaction is said to have an activation energy of 50 kJ. During the reaction, it releases 150 kJ. What type of reaction is this?
💡 Hint: Consider both what happens to energy before and after.
Question 2
In an experiment, a student finds that when 200g of a reactant absorbs 80 kJ of energy, the reaction is classified as what type? Show your explanation.
💡 Hint: Link the energy absorption with the type of reaction.
Challenge and get performance evaluation