chapter_13_Feb_5_2010 - 16-1Important.New office hours: Mon...

Info iconThis preview shows pages 1–6. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: 16-1Important.New office hours: Mon and Fri 11 12; Wed. 4 5http://www.nytimes.com/2009/02/18/education/18college.html?scp=1&sq=max%20roosevelt&st=cse Chemistry Tutor Room Fleming 23616-2Chapter 16Kinetics: Rates and Mechanisms of Chemical Reactions16-3Average, Instantaneous, and Initial Reaction RatesFor example: C2H4(g) + O3(g) C2H4O(g) + O2(g)We will only consider reactant concentrations. So.Rate = - [C2H4]/t = - [O3]/tC2H4(g) + O3(g) C2H4O(g) + O2(g)Time (s)Concentration of O3(mol/L)0.020.030.040.050.060.010.03.20x10-52.42x10-51.95x10-51.63x10-51.40x10-51.23x10-51.10x10-5Rate = - [O3]/t =[(1.10 x 10-5mol/L) (3.20 x 10-5mol/L)]/(60s 0s) =3.50 x 10-7mol/L.sThis is the average rate during 60s of the reaction,O3 decreases an average of 3.50 x 10-7mol/L eachsecond.Over the entire 60s -16-4C2H4(g) + O3(g) C2H4O(g) + O2(g)Time (s)Concentration of O3(mol/L)0.020.030.040.050.060.010.03.20x10-52.42x10-51.95x10-51.63x10-51.40x10-51.23x10-51.10x10-5Average rate over two shorter times- 1st10 secondsRate = - [O3]/t =[(2.42 x 10-5mol/L) (3.20 x 10-5mol/L)]/(10s 0s) =7.80 x 10-7mol/L.s-Last 10 secondsRate = - [O3]/t =[(1.10 x 10-5mol/L) (1.23 x 10-5mol/L)]/(60s 50s) =1.30 x 10-7mol/L.sThe earlier rate is 6x as fast as the later rate. Rate decreases during the course of the reaction.16-5The concentration of O3vs. time during its reaction with C2H4....
View Full Document

Page1 / 15

chapter_13_Feb_5_2010 - 16-1Important.New office hours: Mon...

This preview shows document pages 1 - 6. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online