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Unformatted text preview: 2 (g) + MgCl 2 (aq)) is an exothermic reaction, since the system releases heat to the surroundings, causing an increase of temperature. The reaction of part II took place at a greater rate. It has slightly greater temperature change and it reaches the optimum temperature significantly earlier than the reaction of part I. Collision theory simply means that if anything increases the collision rate, then the rate of reaction increases. The main factors affecting the collision rate are concentration of reactant, pressure, and surface area....
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- Spring '11