December 21, 2024, 11:49:10 AM
Forum Rules: Read This Before Posting


« previous next »
Pages: [1]   Go Down

Topic: Reversible isothermal expansion  (Read 3217 times)

0 Members and 1 Guest are viewing this topic.

Offline manypostcards

  • Regular Member
  • ***
  • Posts: 9
  • Mole Snacks: +0/-0
Reversible isothermal expansion
« on: September 14, 2012, 12:11:34 AM »
For the second step in the problem below, which is a reversible isothermal expansion, how does one conclude to take the natural log of (Pi/Pf) in place of (Vf/Vi)? I've been at it for 40 minutes now. Thanks.

(Expand browser if the image isn't displaying properly.)



Logged

Offline curiouscat

  • Chemist
  • Sr. Member
  • *
  • Posts: 3006
  • Mole Snacks: +121/-35
Re: Reversible isothermal expansion
« Reply #1 on: September 14, 2012, 12:53:51 AM »
Ideal Gas

PV=nRT

Isothermal, hence T=const.

PiVi=PfVf

Logged

Offline manypostcards

  • Regular Member
  • ***
  • Posts: 9
  • Mole Snacks: +0/-0
Re: Reversible isothermal expansion
« Reply #2 on: September 14, 2012, 02:53:25 PM »
Damn that's mindblowing, thank you. I'll have to reread the chapter to find out why you can just do that though.
Logged

Offline curiouscat

  • Chemist
  • Sr. Member
  • *
  • Posts: 3006
  • Mole Snacks: +121/-35
Re: Reversible isothermal expansion
« Reply #3 on: September 14, 2012, 03:03:20 PM »
Quote from: manypostcards on September 14, 2012, 02:53:25 PM
I'll have to reread the chapter to find out why you can just do that though.

Didn't get you.
Logged
Pages: [1]   Go Up
« previous next »
Sponsored Links