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Q. Elementary reaction 2SO2 + O2 = Product. If pressure is increased by 3 times then reaction rate becomes ? a. Increases by 3 times b. Increases by 9 times c. Increases by 18 times d. Increases by 27 times Here correct answer is d. How it came ?

Q. Elementary reaction 2SO2 + O2 = Product. If pressure is increased by 3 times then reaction rate becomes ?


a. Increases by 3 times


b. Increases by 9 times


c. Increases by 18 times


d. Increases by 27 times


 


Here correct answer is d.


How it came ?

Grade:12

1 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
9 years ago
rate of the reaction is given by =k[SO2]^2[O2]
if the presuure is increased 3 times then partial pressure of SO2 is 9p^2
partial pressure of O2=p^2
now the rate of the reaction is 9p^2*p^2=27p^3

thus the rate increases 27 times

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