18. Consider the data showing the initial rate of a reaction (A products) at sev

Question

18. Consider the data showing the initial rate of a reaction (A products) at several different concentrations of A. What is the order of the reaction? Write a rate law for the reaction. including the value of the rate constant, k AJ (M) Initial Rate (M/s) 0.15 0.30 0.60 0.008 0.016 0.032 19. Consider the data showing the initial rate of a reaction (A products) at several different concentrations of A. what is the order of the reaction? Write a rate law for the reaction, including the value of the rate constant, IA] (M) 0.12 0.16 0.20 Initial Rate (M/s) 0.0078 0.0104 0.0130 20. Consider the data showing the initial rate of a reaction (A products) at several different concentrations of A. what is the order of the reaction? Write a rate law for the reaction, including the value of the rate constant, k. A] (M) Initial Rate (M/s) 0.12 0.18 0.28 3.89×10 4 8.75 × 10.4 2.12x103 21·The data shown here were collected for the reaction 2 NO2(g) + F)(g) 2 NO,Hg) [NO,1 (M) IF2l (M) Initial Rate (M/s) 0.100 0.200 0.100 0.2000.200 0.400 0.026 0.051 0.103 0.411 0.100 0.400 Write an expression for the reaction rate law and calculate the value of the rate constant, k. What is the overall order of the reaction? 22. The following data were collected for the reaction CH,CI(g) + 3 Cl2(g)--CCIt(g) + 3 HCI(gi [CH3CI] (M) [Chl (M) Initial Rate (M/s) 0.050 0.100 0.100 0.200 0.050 0.050 0.100 0.200 0.014 0.029 0.041 0.115 Write an expression for the reaction rate law and calculate the value of the rate constant, k. What is the overall order of the reaction?

Explanation / Answer

Ans 18 :

While observing the concentration of reactants and the rate of reaction , we observe that on doubling the concentration of A , the rate of reaction also doubles. And when the concentration of A quadruples , the rate of reaction also increases by a factor of 4.

So the order of reaction is 1.

rate law will be given as :

rate = k [A]

k = 0.008 / 0.15

= 0.053 s-1

the value of rate constant k will be 0.053 s-1

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