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6 marksPrinciples of Chemical Equilibrium

CAPE Chemistry Unit 1 · 2011 · Paper 2 · Question 5(c)(i)

At a certain temperature, Kc = 4.66 x 10⁻³ for the reaction N2O4 (g) ⇌ 2NO2 (g), ΔH = +58 kJ mol⁻¹. 0.800 moles of N2O4 were injected into a closed container of volume 1 dm³.

Calculate the equilibrium concentration of EACH gas, at the same temperature.

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Other parts of this question

  1. 5(a)(i)Why is chemical equilibrium referred to as dynamic?[1 mark]
  2. 5(a)(ii)State THREE characteristics of a chemical system at equilibrium.[3 marks]
  3. 5(b)Define the equilibrium constant, Kc, and describe its significance to a system in dynamic equilibrium. In your response make reference to the importance of its…[3 marks]
  4. 5(c)(ii)Using Le Chatelier's principle, describe the effect, on the equilibrium position, of decreasing the volume of the container.[1 mark]
  5. 5(c)(iii)Describe the effect on the equilibrium constant, Kc, of increasing the temperature of the reaction.[1 mark]

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