physics 202, lecture 5 - web services at pccspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · the...

9
Kinetic Theory Physics 202, Lecture 5 1

Upload: buitruc

Post on 22-Jun-2018

216 views

Category:

Documents


0 download

TRANSCRIPT

Page 1: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

Kinetic Theory

Physics 202, Lecture 5

1

Page 2: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

The kinetic hypothesis identifies heat energy with the random mechanicalenergy of molecules

Physics 202, Lecture 5

2

Page 3: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

The simplest thermal system is one with no molecular interaction at all —an ideal gas

Physics 202, Lecture 5

3

Page 4: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

The Maxwell-Boltzman distribution depicts the molecular speeds in anideal gas

Physics 202, Lecture 5

4

Page 5: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

Entropy measures the distribution of internal energy in a system

Physics 202, Lecture 5

5

Page 6: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

Fick’s law of diffusion and Brownian motion also follows from the kinetichypothesis

Physics 202, Lecture 5

6

Page 7: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

Statistical mechanics based on Newton’s laws is not as successful as itshould be

Physics 202, Lecture 5

7

Page 8: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

The root cause of this failure appears to be “frozen” degrees of freedom

Physics 202, Lecture 5

8

Page 9: Physics 202, Lecture 5 - Web services at PCCspot.pcc.edu/~dulrich/2013p202/2013p202ln05.pdf · The kinetic hypothesis identi es heat energy with the random mechanical energy of molecules

These considerations paved the way to a new theory of quantum mechanics

Physics 202, Lecture 5

9