Chemical Kinetics - Result Question 77

####76. A first order gas reaction has k=1.5×106 per second at 200C. If the reaction is allowed to run for 10h, what percentage of the initial concentration would have change in the product? What is the half-life of this reaction?

(1987,5M)

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Solution:

  1. k=1.5×106s1

kt=ln100100x ln100100x=1.5×106s1×10×60×60s=0.0054

100100x=1.055

x=5.25 reactant is converted into product.

Half-life =ln2k=0.6931.5×106=462000s=128.33h



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