Lecture 23: Diffusion: Fick's First Law and Steady-state Diffusion, Dependence of the Diffusion Coefficient on Temperature and on Atomic Arrangement
recorded by: Massachusetts Institute of Technology, MIT
published: Feb. 10, 2009, recorded: November 2004, views: 17977
released under terms of: Creative Commons Attribution Non-Commercial Share Alike (CC-BY-NC-SA)
Download slides: mit3091f04_sadoway_lec23_01.pdf (1.1 MB)
Download mit3091f04_sadoway_lec23_01.m4v (Video - generic video source 116.2 MB)
Download mit3091f04_sadoway_lec23_01.rm (Video - generic video source 80.5 MB)
Download mit3091f04_sadoway_lec23_01.flv (Video 142.2 MB)
Download mit3091f04_sadoway_lec23_01_320x240_h264.mp4 (Video 149.6 MB)
Download mit3091f04_sadoway_lec23_01.wmv (Video 382.0 MB)
Report a problem or upload filesIf you have found a problem with this lecture or would like to send us extra material, articles, exercises, etc., please use our ticket system to describe your request and upload the data.
Enter your e-mail into the 'Cc' field, and we will keep you updated with your request's status.
"The specific chemical rate constant, k, is the proportionality. And, k can be influenced by temperature through this Arrhenius type relationship, which compares the exponential of the activation energy with the available thermal energy.
And, we saw that we can integrate that rate equation, and put the data to the test. If we have a first-order reaction, we should get a semi-log dependence. And, I think I've got that shown here. Here's the data that I showed you last day.
This is just a normal decrease in concentration with time, typical attenuation curve. If we put it to the first-order test, according to this relationship we should get a straight line with a slope of minus k..."
Link this pageWould you like to put a link to this lecture on your homepage?
Go ahead! Copy the HTML snippet !