(a)(i) State three postulates of the kinetic theory of gases.

(ii) Draw a sketch to illustrate Boyle's law.

(iii) Explain what is meant by "absolute zero of temperature".

(b) Equal volumes of a gas X and oxygen are at the same pressure but temperature of 200 K and 800K respectively.

(i) Giving reason for your answer, state which of the gas samples contains the greater number of molecules.

(ii) If the mass of one molecule of the gas X is 2.19 x 10\(^{-22}\) g, determine the molar mass of X. [Avogadro constant = 6.02 x 10\(^{-23}\)]

(iii) Hence, state with reason which of X and oxygen will diffuse faster under the same conditions. [O= 16].

(c)(i) Mention two reaction conditions that can increase the yield of ammonia in the reaction represented by the following equation: N\(_{2(g)}\) + 3H\(_{2(9)}\) \(\rightleftharpoons\) 2NH\(_{3(g)}\) \(\Dellta\)H = -46kJmol\(^{-1}\). Draw a labelled energy profile diagram for an endothermic reaction.

(iii) A solid W decomposes on heating according to the following equation: W\(_{(s)} \to  Y_{(s}) + Z_{(g)}\) List two factors apart from temperature, which can affect the rate of the reaction.