Practice Calculating K from ΔG° or Vice Versa - 6.4.5 | Chapter 6: Equilibrium | IB Grade 12-Chemistry
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Practice Questions

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Question 1

Easy

What does a negative ΔG° indicate?

💡 Hint: Consider the direction of spontaneity.

Question 2

Easy

Define the term 'equilibrium constant'.

💡 Hint: Think about what happens at equilibrium.

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Interactive Quizzes

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Question 1

What does a negative ΔG° indicate?

  • The reaction is non-spontaneous
  • The reaction is spontaneous
  • No significant change

💡 Hint: Focus on the definition of spontaneity.

Question 2

If K > 1, what does that suggest about the equilibrium?

  • True
  • False

💡 Hint: Think about what K signifies.

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Challenge Problems

Push your limits with challenges.

Question 1

A reaction has ΔH° = -100 kJ/mol and ΔS° = 250 J/(K·mol). Calculate ΔG° at 400 K.

💡 Hint: Convert ΔH° to J and apply at the given temperature.

Question 2

Given K = 0.025 at 298 K, calculate ΔG°. What does this suggest about the reaction's spontaneity?

💡 Hint: Find the value of ln K and work with the given values to derive ΔG°.

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