Quelpr
4 marksPrinciples of Chemical Equilibrium

CAPE Chemistry Unit 1 · 2016 · Paper 2 · Question 5(a)(i)

The following equation represents the reaction between hydrogen and iodine: H₂(g) + I₂(g) ⇌ 2 HI(g), ΔH = -10 kJ mol⁻¹. The reaction is said to be in a state of equilibrium at a particular temperature and pressure.

State FOUR characteristics of a reaction in 'dynamic equilibrium'.

The mark scheme is shown once you've answered.

Practise this question

Other parts of this question

  1. 5(a)(ii)Write the expression for the equilibrium constant in terms of partial pressures, Kₚ, for the reaction shown by the equation above.[2 marks]
  2. 5(a)(iii)State TWO factors which would NOT affect the equilibrium of the reaction shown by the equation above.[2 marks]
  3. 5(b)(i)Describe the effect of decreasing the temperature on the equilibrium of the reaction[2 marks]
  4. 5(b)(ii)Describe the effect of decreasing the temperature on the value of Kₚ.[2 marks]
  5. 5(c)When 0.5 mol of hydrogen and 0.5 mol of iodine are allowed to reach equilibrium in a 1.00 dm³ flask at 500 °C and 1.01 × 10⁵ N m⁻², the amount of hydrogen…[3 marks]

More practice: the rest of this paper · more Principles of Chemical Equilibrium questions · all CAPE Chemistry Unit 1 past papers