Register to reply

Classical entropy as phase space volume

by elemental09
Tags: classical, entropy, phase, space, volume
Share this thread:
elemental09
#1
Feb13-12, 07:28 PM
P: 40
The entropy of a classical system of N particles is normally (see e.g. Huang p.131) defined as the k_b times the natural log of the volume of phase space accessible to the system.
My question is: how can we take the logarithm of the phase space volume, when the volume has units? For N particles, the phase space volume has units [mass]^3N*[distance]^6N*[time]^(-3N).
Phys.Org News Partner Physics news on Phys.org
Physical constant is constant even in strong gravitational fields
Physicists provide new insights into the world of quantum materials
Nuclear spins control current in plastic LED: Step toward quantum computing, spintronic memory, better displays

Register to reply

Related Discussions
Is entropy the volume in phase space of energy E or LESS than E? General Physics 1
Phase-Space volume V - Roger Penrose Cosmology 2
Phase space volume Quantum Physics 1
Volume element in phase space Advanced Physics Homework 0
Volume of N dimensional phase space Advanced Physics Homework 3