This preview shows page 1. Sign up to view the full content.
Unformatted text preview: t
In DLM 3.2.3 you will deduce the answer: # nn = ?? x NA If two atoms are not touching do they still contribute to Ebond ?
M. Chertok, Physics 7A 18 Particle Model of Ethermal
Remember: thermal energy is due to microscopic random motion
For solids, liquids: atoms are “stuck” in place, but oscillate in how many different directions? More or less motion as T increases? T is the indicator for thermal energy For gases, what is the motion? Translational, in 3 directions Equipartition: count the ways an atom can store energy
These are called “modes”
M. Chertok, Physics 7A 19 Equipartition
Ethermal/mode ∝T Actual formula is
Ethermal/mode = ½kBT kB is Boltzmann’s constant
kB = 1.38 x 1023 J/K Most of next week is practicing counting #modes
This allows us to determine the total Ethermal M. Chertok, Physics 7A 20 Additional info
Quiz 5 next Friday
Through DLM 09 including followups in DLM10 Reading (just a reminder)
Read and reread Chapter 3 Start Ch. 4 Practice problems will start appearing on website
No solutions No claim that these are like future quizzes M. Chertok, Physics 7A 21...
View Full
Document
 Fall '08
 PARDINI
 Physics

Click to edit the document details