The activation energy in the forward direction for the following reaction is 134 kJ/mol . 4 H° for the reaction is -226 kJ/molxn. The reaction occurs in a single step.

C O(g)+N O_{2}(g) \rightleftarrows C O_{2}(g)+N O(g) (a) What is the activation energy in the reverse direction? Draw the best-activated complex for theabove reaction and explain why you think this activated complex is best. (b) Give the reasons why all collisions between molecules are not effective in causing a reaction.What effect does the increasing temperature usually have on the rate of the reaction.

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