Practice Questions
Test your understanding with targeted questions related to the topic.
Question 1
Easy
What does standard entropy (S°) measure?
💡 Hint: Think about the arrangement of particles.
Question 2
Easy
Write the formula for the change in entropy of a reaction (ΔS_rxn°).
💡 Hint: Consider what happens to the entropy of products and reactants.
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Interactive Quizzes
Engage in quick quizzes to reinforce what you've learned and check your comprehension.
Question 1
What does standard entropy (S°) indicate about a system?
- It indicates the energy content
- It measures disorder
- It is always zero
💡 Hint: Think about how particles are organized.
Question 2
Is ΔS_rxn° always positive when products are more complex molecules than reactants?
- True
- False
💡 Hint: Consider the relationship between complexity and disorder.
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Challenge Problems
Push your limits with challenges.
Question 1
Given that the standard entropies for A, B, C, and D are 50 J K⁻¹ mol⁻¹, 75 J K⁻¹ mol⁻¹ and 100 J K⁻¹ mol⁻¹ respectively, calculate ΔS_rxn° for the reaction: A + B → C + D.
💡 Hint: Sum entropies of products and subtract the sum of reactants.
Question 2
Explain how an increase in the number of gaseous reactants affects entropy and the spontaneity of a reaction at constant temperature.
💡 Hint: Think about the kinetic energy and freedom of movement in gases.
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