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A level: Kinetic Theory Questions

Q11.

(a)

(i) One of the assumptions of the kinetic theory of gases is that molecules make elastic collisions. State what is meant by an elastic collision.

(ii) State two more assumptions that are made in the kinetic theory of gases.

(3 marks)

(b) One mole of hydrogen at a temperature of 420 K is mixed with one mole of oxygen at 320 K. After a short period of time the mixture is in thermal equilibrium.

(i) Explain what happens as the two gases approach and then reach thermal equilibrium.

(ii) Calculate the average kinetic energy of the hydrogen molecules before they are mixed with the oxygen molecules.

(4 marks)

(Total 7 marks)