P404-Midterm2aa-S08

P404-Midterm2aa-S08 - Physics 404: Second Midterm Test Name...

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

View Full Document Right Arrow Icon
Physics 404: Second Midterm Test Name ( print ): "I pledge on my honor that I have not given or received any unauthorized assistance on this examination." April 17, 2008 Sign Honor Pledge: Don't get bogged down on any problem you find difficult. Skip ahead and go through all 4 pages, then come back to it afterwards!! If you find a question ambiguous, ask or write a short explanation of why.) Much of the reference information at the end should be of help. 1. A block of lead with heat capacity C is cooled from T h by plunging it into a cold bath at T . a) What is the change in entropy of the lead? b) What is the change in entropy of the water in the cold bath? c) What is the total change in entropy? Is it positive, negative, or 0? d) If the lead block is instead cooled in steps by plunging it successively into baths at intermediate temperatures, indicate how the various entropies above change. 2. Consider expansion of a thermally isolated ideal gas, with initial pressure p i , to 3 times the initial volume. a) If the expansion is done reversibly (e.g. by pushing on a piston), how much work is done by the gas? b) What is the change in entropy of the gas
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 12/29/2011 for the course PHYSICS 404 taught by Professor Anlage during the Fall '11 term at Maryland.

Page1 / 5

P404-Midterm2aa-S08 - Physics 404: Second Midterm Test Name...

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

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