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Topic 6. Chemical Kinetics mol 1. Which graph shows the Maxwell-Boltzmann energy distribution of a same amount of a gas at two temperatures, where T2 is greater than T.? a. Fraction of particles 3. In general, the rate of a reaction can be increased by all of the following except increasing the temperature b. increasing the activation energy c. increasing the concentration of reactants d. increasing the surface area of the reactants Fraction of particles Kinetic energy Kinetic energ 4. The reaction between calcium carbonate and hydrochloric acid, carried out in an open flask, can be represented by the following equation. TE Fraction of pe Fraction of particles klacle chce CaCO3 (s) + 2 HCl(aq) → CaCl22 (aq) + H20 (1) + CO2 (g) Kinetic energy Kinetic energy 2. Which statement about the activation energy of a reaction is correct? a. The activation energy is changed by the presence of a catalyst but not by an increase in temperature. b. The activation energy is changed by an increase in temperature but not by the presence of a catalyst. The activation energy is changed by both an increase in temperature and the presence of a catalyst. d. The activation energy is not changed by either an increase in temperature or the presence of a catalyst. Which of the measurements below could be used to measure the rate of the reaction? I. the mass of the flask and contents II. the pH of the reaction mixture III. the volume of carbon dioxide produced a. I and II only b. I and III only C. II and III only d. I, II and III C.