445lec11 - PHYS 445 Lecture 11 - Thermodynamics Lecture 11...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
PHYS 445 Lecture 11 - Thermodynamics 11 - 1 © 2001 by David Boal, Simon Fraser University. All rights reserved; further resale or copying is strictly prohibited. Lecture 11 - Thermodynamics What's Important: laws of thermodyncamics determination of k B why does thermodynamics work? Text : Reif Laws of thermodynamics Starting with the microscopic picture of statistical mechanics, we have now established the laws of thermodynamics: Zeroth Law Two systems each in thermal equilibrium with a third system must be in thermal equilibrium with each other. First Law E = Q - W Second Law S 0; for small changes dS = d Q T Third Law The entropy decreases to some minimal value S o as T decreases to zero (this law is necessary to describe some spin systems, particularly if they do not order at T = 0). How do we determine k B T ? One approach is to invoke the ideal gas law. We showed previously that E f = 1 2 k B T which doesn't tell us k B unless we can measure E . A more direct route is to use a generalized force relation
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/07/2009 for the course PHYS 445 taught by Professor Davidboal during the Spring '08 term at Simon Fraser.

Page1 / 3

445lec11 - PHYS 445 Lecture 11 - Thermodynamics Lecture 11...

This preview shows document pages 1 - 2. Sign up to view the full document.

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