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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 the enthalpy being a state function.
Question 2
Easy
What is a state function?
💡 Hint: Does it depend on how you got there?
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 does Hess's Law indicate about total enthalpy change?
- Is path-dependent.
- Is path-independent.
- Depends only on reactants.
💡 Hint: Consider if the steps matter.
Question 2
True or False: Hess's Law can be utilized to calculate the enthalpy changes from known reactions.
- True
- False
💡 Hint: Think about combining reactions.
Solve and get performance evaluation
Challenge Problems
Push your limits with challenges.
Question 1
Calculate the ΔH for the reaction: 2 H₂(g) + O₂(g) → 2 H₂O(l) using Hess's Law if you know the standard enthalpy of formation for H₂O is -285.8 kJ/mol.
💡 Hint: Remember to account for each mole of product formed.
Question 2
If the formation enthalpy of CO(g) is -110.5 kJ/mol and that for O₂ is zero, what would be the total ΔH for the reaction: C(s) + O₂(g) → CO(g) using Hess's Law?
💡 Hint: Use the fact that elemental states have zero formation enthalpy.
Challenge and get performance evaluation