question_answer 10)

From the rate expression for the following reactions, determine their order of reaction and the dimensions of the rate constants. (i) 3NO (g) ® N2O (g) + NO2 (g);                                                Rate = k [NO]2 (ii) H2O2 (aq) + 3I? (aq) + 2H+  2H2O(I)+         Rate = k [H2O2] [I?] (iii) CH3CHO(g)  CH4(g) + CO (g) ;                          Rate = k [CH3CHO]3/2 (iv) C2H5Cl(g)  C2H4(g) + HCl (g);                            Rate = k [C2H5Cl]  

Answer:

(i) Order = 2 Units of k. (ii) Order = 1 + 1 = 2 Unit of K. (iii) Order = Units of k.   (iv) Order = 1 Unit of k.