1. Describe the two criteria that must be met in order for a reaction to take place according to collision theory. Answer (2 marks) 2. Consider the following reaction: A2(g)+B2(g)2AB(g) The activation energy (Ea) in the forward direction is +143kJ. The activation energy (Ea) for the reverse direction is 75kJ. Draw a properly labelled potential energy diagram for the forward direction. Include rH, axis, reactants and products, activation energy and activated complex. Is this reaction endothermic or exothermic? Answer (6 marks) [ 3. The combustion of sugar in a calorimeter is similar to the oxidation of sugar in the body. A grade 12 student ate three sugar cubes, with masses of 6.84g,6.75g and 6.79g. a. Calculate the overall molar enthalpy of oxidation of sugar, C12H22O11 (s), to carbon dioxide and water in the body. Answer (3 marks) b. Using these three sugar cubes as representative of regular-sized cubes, determine the amount of energy released by an average-sized cube