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A level: Kinetic Theory Questions

Q2.

(a) Use the kinetic theory of gases to explain why:

(i) the pressure exerted by an ideal gas increases when it is heated at constant volume,

(ii) the volume occupied by an ideal gas increases when it is heated at constant pressure.

(4 marks maximum)

(b) A quantity of 0.25 mol of air enters a diesel engine at a pressure of 1.05 × 105 Pa and a temperature of 27°C. Assume the gas to be ideal.

(i) Calculate the volume occupied by the gas.

(ii) When the gas is compressed to one twentieth of its original volume the pressure rises to 7.0 × 106 Pa.

Calculate the temperature of the gas immediately after the compression.

(4 marks)

(Total 8 marks)