For the reaction
2NO(g) + Cl2 (g) 2NOCl(g)
the following data were collected. All the measurements were taken at 263 K :
Experiment No. Initial Initial Initial rate of disapppearance of Cl2(M/min)
[NO] (M) [Cl2] (M)
1 0.15 0.15 0.60
2 0.15 0.30 1.20
3 0.30 0.15 2.40
4 0.25 0.25 ?
(a) Write nthe expression for rate law.
(b) Calculate the value of rate constant and specify its units.
(c) What is the initial rate of disappearance of Cl2 in exp. 4?