# ps2 - Chem 120B Problem Set 2 Due: February 5, 2010 1....

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

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Chem 120B Problem Set 2 Due: February 5, 2010 1. Problems 17-8 and 17-43 in McQuarrie & Simon’s Physical Chemistry textbook. For problem 17-8, note that the two spin states of a proton in a magnetic field have energies ± planckover2pi1 γB z / 2 . Calculate the field strength B z for which the number of protons aligned with the field is twice that of protons aligned against the field, N w = 2 N o , at T = 300 K . 2. Consider a particle of mass m in a uniform gravitational field. Its potential energy is E ( h ) = mgh , where h is the height above sea level and g is the earth’s gravitational constant, g = 9 . 8 m/s 2 . (i) According to the Boltzmann distribution, what is the probability p ( h ) of finding the mass at height h , relative to the probability p (0) of finding it at sea level ( h = 0 ), at temperature T ? (ii) Now imagine that there are N such masses, all identical and non-interacting. On average, how many of these objects reside at height h , relative to the number at sea level? Express your answer in terms of relative densities, ρ ( h ) /ρ (0) , where ρ ( h ) denotes the number of masses per unit volume at height h ....
View Full Document

## This note was uploaded on 03/08/2010 for the course CHEM 120B taught by Professor Geissler during the Spring '08 term at University of California, Berkeley.

### Page1 / 3

ps2 - Chem 120B Problem Set 2 Due: February 5, 2010 1....

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

View Full Document
Ask a homework question - tutors are online