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For a decomposition of azoisopropane at 270 ° C it was found that at t = 0, the total pressure was 33.15 mm of Hg and after 3 minutes the total pressure was found to be 46.3 mm of Hg. Calculate the value of K for this reaction. ( C H 3 ) 2 C H N = N C H ( C H 2 ) 2 → N 2 + C 6 H 14

Options

  1. A0.168 m i n - 1
  2. B0.173 m i n - 1
  3. C0.18 m i n - 1
  4. D0.154 m i n - 1

Correct answer

A. 0.168 m i n - 1

Step-by-step solution

k = 2.303 t l o g p o ( n - 1 ) n p o - p 1 k = 2.303 3 l o g 33.15 ( 2 - 1 ) 2 × 33.15 - 46.3 k = 0.168 m i n - 1

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