Chemistry Chapter 15: Chemical Equilibrium
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Questions and Answers

What is the relationship between the equilibrium constant Kp and Kc?

  • Kp = Kc / (RT)∆n
  • Kp = Kc (RT)∆n (correct)
  • Kp = Kc + (RT)∆n
  • Kp = Kc - (RT)∆n

    • What does a value of K >> 1 indicate about the reaction?

  • The reaction is irreversible
  • The reaction is at equilibrium
  • The reaction is product-favored (correct)
  • The reaction is reactant-favored

    • Why does the equilibrium constant remain the same regardless of the initial concentrations of reactants and products?

  • Because the reaction is at a fixed temperature
  • Because the equilibrium constant is a ratio of concentrations (correct)
  • Because the reaction is reversible
  • Because the reaction rate is independent of concentration

    • What is the significance of ∆n in the equation Kp = Kc (RT)∆n?

    <p>It represents the difference in moles of gaseous reactants and products (A)</p> Signup and view all the answers

    What happens to the equilibrium when K < 1?

    <p>The equilibrium shifts to the left (C)</p> Signup and view all the answers

    What is the implication of the equilibrium constant being the same regardless of the direction of the reaction?

    <p>The reaction is reversible, and can be reached from either direction (D)</p> Signup and view all the answers

    What is the condition for a system to be in chemical equilibrium?

    <p>The forward and reverse reactions are proceeding at the same rate (B)</p> Signup and view all the answers

    What is the relationship between the rate constants kf and kr at equilibrium?

    <p>kf / kr = Keq (B)</p> Signup and view all the answers

    What is the equilibrium expression for the reaction aA + bB cC + dD?

    <p>Keq = [C]c[D]d / [A]a[B]b (A)</p> Signup and view all the answers

    What is the purpose of the double arrow in a chemical equation at equilibrium?

    <p>To indicate that the reaction is reversible (B)</p> Signup and view all the answers

    What is the relationship between the equilibrium constants Kc and Kp?

    <p>Kc = Kp (D)</p> Signup and view all the answers

    What is the rate law for the forward reaction N2O4 (g) 2 NO2 (g)?

    <p>Rate = kf [N2O4] (D)</p> Signup and view all the answers

    When a system at equilibrium is disturbed by a change in temperature or pressure, what happens to the equilibrium position?

    <p>It shifts to counteract the effect of the disturbance (C)</p> Signup and view all the answers

    What is the effect of adding more of a reactant to a system in equilibrium?

    <p>The equilibrium shifts to the right (A)</p> Signup and view all the answers

    What is the purpose of removing ammonia (NH3) from the system in the Haber Process?

    <p>To shift the equilibrium to the right (A)</p> Signup and view all the answers

    What is the effect of a catalyst on a system in equilibrium?

    <p>It increases the rate of both the forward and reverse reactions (B)</p> Signup and view all the answers

    What happens to the equilibrium constant (K) when the temperature of a system is increased?

    <p>It remains constant (A)</p> Signup and view all the answers

    What is the relationship between the equilibrium constant (K) and the rate of the forward reaction?

    <p>K is independent of the rate of the forward reaction (B)</p> Signup and view all the answers

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