Lect24 - PHYS 172: Modern Mechanics Lecture 24 Heat...

Info iconThis preview shows pages 1–7. Sign up to view the full content.

View Full Document Right Arrow Icon
Fall 2011 PHYS 172: Modern Mechanics Lecture 24 – Heat Capacity Read 12.6 1
Background image of page 1

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

View Full DocumentRight Arrow Icon
Last Time Einstein Model of Solids (springs + balls) ( ) ( ) 1 ! ! 1 ! q N q N + ! # = ! # microstates N oscillators & q quanta Fundamental assumption of statistical mechanics Over time, an isolated system in a given macrostate (total energy) is equally likely to be found in any of its microstates (microscopic distribution of energy). 2
Background image of page 2
Energy is exchanged until the most probable distribution is reached. ln S k ! " int 1 dS T dE ! 1 2 1 1 1 0 dS dS dS dq dq dq = + = 1 2 1 2 dS dS dq dq = Equilibrium = Most Probable Distribution 3
Background image of page 3

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

View Full DocumentRight Arrow Icon
Brief Review of Heat Capacity Today: Heat Capacity Pb vs Al: A Chain of Reasoning Quantum versus Classical 4
Background image of page 4
Note: How Do Heat and Work Differ? WORK Compress a solid (force through a distance): SHAPE changes Energy Levels Change HEAT Energy levels don ` t change. Transfer quanta from one place to another. 5
Background image of page 5

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

View Full DocumentRight Arrow Icon
Heat Capacity How much heat do you have to add to change the temperature by a certain amount?
Background image of page 6
Image of page 7
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 14

Lect24 - PHYS 172: Modern Mechanics Lecture 24 Heat...

This preview shows document pages 1 - 7. Sign up to view the full document.

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