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At 345   K , the half life for the decomposition of a sample of a gaseous compound initially at 55 . 5   kPa was 340   s . When the pressure was 27 . 8   kPa , the half life was found to be 170   s . The order of the reaction is - [integer answer]

Correct answer

0

Step-by-step solution

t 1 / 2 1 t 1 / 2 2 = P 1 P 2 1 - n ⇒ 340 170 = 55 . 5 27 . 8 1 - n 2 1 = 2 1 - n 1 = 1 - n ⇒ n = 0 For zero order reaction half life is directly proportional to the initial concentration.

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