Kinetics a) The diagram shows a Maxwell-Boltzmann distribution of particle energies, including the activation energy, Ea, for a reaction. Number of particles with given energy EA Energy An increase in temperature will (1 mark) A increase the area under the curve. B move the peak of the curve to the right. с raise the height of the peak. D move the position of the activation energy, Ea, to the left. b) Hydrochloric acid can be produced when hydrogen and chlorine react. H2(g) + Cl2(g) → 2HCl(g)
b) Hydrochloric acid can be produced when hydrogen and chlorine react. H2(g) + Cl2(g) → 2HCl(g) i. Suggest one reason to explain why the reaction between hydrogen and chlorine is slow at room temperature. (1 mark) ii. State and explain what the effect of increasing the pressure, at a constant temperature would have on the rate of the reaction. (3 marks) c) Hydrogen peroxide solution decomposes slowly to form water and oxygen. The reaction is much faster in the presence of a manganese(IV) oxide catalyst. - 2H2O2(aq) — 2H2O(l) + O2(g) State and explain, in terms of collision theory, the effect of increasing the concentration of hydrogen peroxide on the rate of reaction. (3 marks)
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