Equilibrium Constant Quiz
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Questions and Answers

Which of the following scientific notations represents the largest value?

  • 3.1 × 10^3 (correct)
  • 5.6 × 10^1
  • 1.8 × 10^-1
  • 3.2 × 10^-4
  • What is the value of the equilibrium constant (Kc') for the reverse reaction of the reaction 2 NO(g) + O2(g) ⇌ 2 NO2(g), given the equilibrium concentrations of NO, O2, and NO2 are 0.300 M, 0.200 M, and 0.530 M, respectively, at 25°C?

  • 0.624
  • 15.6
  • 0.0340
  • 0.0641 (correct)
  • For the reaction 2 CH4(g) + 3 O2(g) ⇌ 2 CO(g) + 4 H2O(g), which statement about the relationship between Kp and Kc is correct?

  • Kp and Kc are not related
  • Kp > Kc (correct)
  • Kp = Kc
  • Kp < Kc
  • If a flask initially contains 1.00 atm of each gas for the isomerization reaction cis-2-butene ⇌ trans-2-butene with Kp = 3.40 at 25°C, in which direction will the system shift to reach equilibrium?

    <p>It will shift to the reactant side</p> Signup and view all the answers

    For the isomerization reaction butane ⇌ isobutane with Kp = 25 at 500°C, if the initial pressures of butane and isobutane are 10.0 atm and 0.0 atm, respectively, what are the equilibrium pressures of the two gases?

    <p>Pbutane = 0.38 atm and Pisobutane = 9.6 atm</p> Signup and view all the answers

    What is true about the equilibrium constant for a chemical reaction?

    <p>The value of the equilibrium constant changes as the temperature changes.</p> Signup and view all the answers

    What is the value of the equilibrium constant, $K_c$, for the reaction: A(g) + B(g) ⇌ 2C(g) at 25°C, given the rate constants $k = 1.4 \times 10^{-12}$ M$^{-1}$ s$^{-1}$ for the forward reaction and $k = 2.7 \times 10^{-13}$ M$^{-1}$ s$^{-1}$ for the reverse reaction?

    <p>5.2</p> Signup and view all the answers

    Which of the following reactions has the largest equilibrium constant?

    <p>A$_2$ + B$_2$ ⇌ 2 AB</p> Signup and view all the answers

    What is the equilibrium equation for the reaction: NH$_4$NO$_3$(s) ⇌ N$_2$O(g) + 2 H$_2$O(g)?

    <p>$K_c = [\text{N}_2\text{O}] [\text{H}_2\text{O}]^2$</p> Signup and view all the answers

    Given the reaction 2 HI(g) ⇌ H$_2$(g) + I$_2$(g) at 300 K, the partial pressure of HI at equilibrium is 1.8 × 10$^{-3}$ atm and the partial pressures of H$_2$ and I$_2$ are both 0.10 atm. What is the value of the equilibrium constant $K_p$ at 300 K?

    <p>1.0 × 10$^{-5}$</p> Signup and view all the answers

    Which statement about the equilibrium constant is correct?

    <p>The equilibrium constant changes as the temperature changes.</p> Signup and view all the answers

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