Consider the following first order gas phase reaction at constant temperature A ( g ) → 2 B ( g ) + C ( g ) If the total pressure of the gases is found to be 200 torr after 23 sec . and 300 torr upon

Question

Consider the following first order gas phase reaction at constant temperature A ( g ) → 2 B ( g ) + C ( g ) If the total pressure of the gases is found to be 200 torr after 23 sec . and 300 torr upon the complete decomposition of A after a very long time, then the rate constant of the given reaction is ______ × 1 0 − 2 s − 1 (nearest integer) [Given : lo g 10 ​ ( 2 ) = 0.301 ]

TestHub · Accepted Answer

​ A ( g ) → 2 B ( g ) + C ( g ) P 23 ​ = P 0 ​ + 2 x = 200 P ∞ ​ = 3 P 0 ​ = 300 P 0 ​ = 100 K = t 1 ​ ln P ∞ ​ − P t ​ P ∞ ​ − P 0 ​ ​ K = 23 2.3 ​ lo g 300 − 200 300 − 100 ​ = 23 2.3 × 0.301 ​ = 0.0301 = 3.01 × 1 0 − 2 sec − 1 ​

Chemistry - Chemical Kinetics Question with Solution | TestHub

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