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Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does Hess's Law state?
💡 Hint: Think about steps in a journey.
Question 2
Easy
What happens to ΔH when you reverse a reaction?
💡 Hint: Consider it like undoing something!
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
Hess's Law states that the total enthalpy change is dependent on:
- The pathway taken
- The initial and final states
- The temperature
💡 Hint: Remember, it's all about the start and finish!
Question 2
True or False: The enthalpy change of a reaction is always positive.
- True
- False
💡 Hint: Think about heat absorption and release.
Solve 1 more question and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Given the enthalpy changes for the following reactions: 1) C + O₂ → CO₂, ΔH = -393.5 kJ; 2) CO + ½O₂ → CO₂, ΔH = -283.0 kJ, calculate the ΔH for the reaction C + ½O₂ → CO.
💡 Hint: Pay close attention to the coefficients and how they affect enthalpy.
Question 2
If you find the ΔH for the formation of a compound from its elements is unknown, how would you use Hess's Law to find it?
💡 Hint: Look for routes that include your desired reactants and products.
Challenge and get performance evaluation