CHEM 1110 Spring 2004

Chemical Kinetics

Additional Problem 1

The compound, nitrogen dioxide decomposes to nitrogen monoxide and diatomic oxygen, according to the reaction:

2 NO₂(g) ® 2 NO(g) + O₂(g). The concentration versus time data, obtained at 330^oC, were used to prepare the graphs below. The initial concentration was 0.0100 mol/L.

a) What is the order of the reaction, and what is the rate law?

b) Write the integrated rate law.

c) From the appropriate graph, estimate the rate constant. Include the units.

d) During the course of the experiment, the laboratory clock stopped working. The concentration at the end of the experiment was found to be 0.0015 mol/L. How much time had elapsed since the beginning of experiment?

e) What concentration of NO₂ will be left after 1.00 min?