Answer to Question #152985 in Physical Chemistry for Bakr

Question #152985
Q11:- At 400 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 28.9 kPa, the half-life was 178 s. Determine the order of the reaction.
1
Expert's answer
2020-12-29T02:42:52-0500

Let's test n=0:

k1=(p0)1/(2t1/2)=55500/(2340)=81.6k_1=(p_0)_1/(2*t_{1/2})=55500/(2*340)=81.6

k2=(p0)2/(2t1/2)=28900/(2178)=81.1k_2=(p_0)_2/(2*t_{1/2})=28900/(2*178)=81.1

Constants are almost equal, so we have 0-order reaction.


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