#4. (3 pts) Consider the decomposition reaction: A-) B. The following graphs sho

Question

#4. (3 pts) Consider the decomposition reaction: A-) B. The following graphs shows the change in concentration with respect to time for the reaction. Which graph shows where the reverse rate constant is smaller than forward rate constant? 100 80 60 100 100 50 [A 20 20 20 0 S 10 15 20 0 5 10 5 20 0 5 10 15 20 time time time #5. (3 pts) This reaction was experimentally determined to be first order with respect. and second order with respect to NO. 0(3) +2 NO(g) 2 NO(g) These diagrams represent reaction mixtures in which the number of each type of mole- cale represents its relative initial concentration. Which mixture will have the fastest isitial rate? Jo 01 po

Explanation / Answer

#4 The first graph is the required answer.This is because if the forward rate constant is larger, then the forward reaction must be faster than the backward reaction. It means the utilisation of A species must be faster than species B, which is best represented by first graph at the leftmost corner.

#5 Rate law, r=k[O2][NO2]2

It means if O2 has x number of molecules, then NO2 must have x2 number of molecules. So best represented figure for the required rate law would be the third one at the rightmost corner, with 2 molecules of O2 and 4 molecules of NO2

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