🧪 Chemistry Quiz 17: Chemical Equilibrium

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🧪 Chemistry · Quiz 017

Use the kinetic foundation from CHEM-016 to explain dynamic equilibrium, equilibrium expressions, reaction quotients, and system responses to disturbances.

Learning goalInterpret equilibrium quantitatively and qualitatively while distinguishing changes in composition from changes in the equilibrium constant.

  • 5 questions
  • Advanced connections
  • Explanations after finishing
Answered 0/5
FoundationWhich statement correctly describes a reversible reaction at dynamic equilibrium?
Need a small nudge?

Distinguish equal rates from equal concentrations and distinguish dynamic balance from stopped molecular change.

UnderstandingFor N₂O₄(g) ⇌ 2NO₂(g), which expression is the concentration equilibrium constant Kc?
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Products go in the numerator, reactants in the denominator, and stoichiometric coefficients become exponents.

ApplicationFor A(g) ⇌ B(g) at a given temperature, Kc = 4.0. A mixture currently has Qc = 1.0. In which direction will the net reaction proceed as equilibrium is approached?
Need a small nudge?

Compare the current product-to-reactant ratio represented by Q with the equilibrium ratio represented by K.

InterpretationFor N₂(g) + 3H₂(g) ⇌ 2NH₃(g) at fixed temperature, some NH₃ is removed from a system initially at equilibrium. What happens after the disturbance?
Need a small nudge?

Separate the temporary change in composition from the value of K, which depends on temperature for a specified reaction.

ConnectionFor the Haber equilibrium N₂(g) + 3H₂(g) ⇌ 2NH₃(g) at fixed temperature, pressure is increased by decreasing volume and a catalyst is added. Which conclusion is correct?
Need a small nudge?

Treat the pressure change and catalyst as two separate interventions. Ask what each one changes.

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