Answer to Question #177470 in Physical Chemistry for choutzuyu

Question

Consider the data presented from the following reaction: A(g) —> B(g):

time(sec): 0, 40, 80, 120, 160

[A](moles/liter): .100, .067, .045, .030, .020

a) determine if the reaction is of the 1st order or 2nd order using the appropriate data and graphs. 

b) what is the value of the rate constant. 

c) what is half-life of the reaction.

Answer 1

a) It is a first order ;the rate r depends only on the concentration of one reactant(there maybe other but their reaction order must be zero).

b) $k _2 ​ =1.74×10^{ −5} s ^{ −1}$

c) $t_{\frac {1} {2}} =3.465×10 ^{−3} s$