The rate expression for the reaction A(g)+B(g)→C(g) is rate= kCA2 CB1/2 . What changes in the initial concentrations of A and B will cause the rate of reaction to increase by a factor of eight?
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a
CA×2; CB×2
b
CA×2; CB×4
c
CA×1; CB×4
d
CA×4; CB×1
answer is B.
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Detailed Solution
For the reaction, A(g)+B(g)→ C(g)Given,Rate=KCA2CB1/2Rate of reaction to increase by a factor of eightRate=k[2CA]2[4CB]1/2=4×2[CA]2[CB]1/2