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Which reaction characteristic changes as the reaction proceeds?

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Which reaction characteristic changes as the reaction proceeds?

Post  JasonGHerbalExt on Tue Jan 20, 2015 1:10 am

The reaction CH3NC -> CH3CN is first order. Which reaction characteristic changes as the reaction proceeds?

(A) the half life (B) the rate constant
(C) the rate law (D) the reaction rate

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Rate Law & Rxn Rate

Post  DrPelezo on Fri May 22, 2015 6:16 pm

C. Rate Law ... The yield of a reaction is affected by 5 major factors. To ID the 5 factors, use the simple acronym C.A.N.T.C => Concentration, Area (surface area), Nature of reacting substances, Temperature & Catalysts. When the Kinetics of a reaction is studied, it's character is typically defined mathematically in terms of a rate law. Example: For A => Products, the rate law as a function of concentration is written Rate = k[A]^x, where k = rate constant, [A] = Molar Concentration & x = order of rxn (i.e., rate trend).

D. choice may give pause arguing that the Rxn Rate is dependent upon the 5 factors noted above, and this is true. In the absence of additional info, C & D both could be defended, in my humble opinion, for the answer to the question.

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