1.The equation below shows the equilibrium reaction for the conversion of dinitrogen tetroxide, N₂O₄(g) , to nitrogen
dioxide, NO₂(g).

Which one of the following occurs when the temperature is increased from 35 °C to 80 °C?

Solution

2. Hydrogen gas, H₂(g), can be produced by reacting methane, CH₄(g), with steam, H₂O(g), at 300 °C in the
presence of a suitable catalyst. The equation for the reaction is shown below.

a. State a source of CH₄(g). 1 mark

Solution

b. A suitable catalyst plus 25.0 mol of CH₄(g) and 25.0 mol of H₂O₂(g) are placed into an empty, sealed 100.0 L container at
300 °C. After the reaction has reached equilibrium, the container contains 6.12 mol H₂(g).
i. Write an expression for the equilibrium constant. 1 mark

Solution

ii. Calculate the equilibrium constant, K, for this reaction at 300 °C. 4 marks

Solution

c. The temperature of the equilibrium system is decreased.
State how the decrease in temperature changes the shape of the Maxwell-Boltzmann distribution. You may use diagrams in your answer. 1 mark

Solution