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Solution: The rate law for the rearrangement of CH3NC to CH3CN at 800 K is Rate = (1300 s-1) [CH3NC]. What is the half-life for this reaction? a. 1.9 x 10-3 s b. 1920 s c. 5.33 x 10-4 s d. 520 s

Problem

The rate law for the rearrangement of CH3NC to CH3CN at 800 K is Rate = (1300 s-1) [CH3NC]. What is the half-life for this reaction? 

a. 1.9 x 10-3

b. 1920 s 

c. 5.33 x 10-4

d. 520 s


Solution

We’re being asked to determine the half-life for the rearrangement of CH3NC to CH­3CN


Recall that half-life is the time needed for the amount of a reactant to decrease by 50% or one-halfThe rate law for a chemical reaction is generally given by:



The reaction is CH3NC  CH3CN and the given rate law for this reaction is:



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