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.
$(C H_{3})_{2} C H N = N C H (C H_{2})_{2} \to N_{2} + C_{6} H_{14}$

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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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