GR | # Login | Register
  GR9277 #46
GREPhysics.NET Official Solution    Alternate Solutions

Isotherms and coexistence curves are shown in the pV diagram above for a liquid-gas system. The dashed lines are the boundaries of the labeled regions.

Which numbered curve is the critical isotherm?

  1. 1
  2. 2
  3. 3
  4. 4
  5. 5

Thermodynamics}Critical Isotherm

The critical isotherm is the (constant temperature) line that just touches the critical liquid-vapor region, explained in the next question. The condition for the critical isotherm is \left(\frac{dP}{dV}\right)_c=0 and \left(\frac{d^2P}{dV^2}\right)_c=0, where c denotes the critical point.

See below for user comments and alternate solutions! See below for user comments and alternate solutions!
Alternate Solutions
There are no Alternate Solutions for this problem. Be the first to post one!
2010-11-11 23:25:48
Easy way even without knowing anything in physics at all. There is nothing "critical" about 1, 3 -5. Only 2 looks "critical".NEC
2008-10-14 21:49:48
Answer should be 2.NEC
Ning Bao
2008-01-29 11:48:28
Immediately we know that there is ino difference between 3, 4, and 5: their properties are the same. There is also nothing differentiating curve 1 from a curve just above or just below it. Only curve 2 is unique enough to be the anwer.NEC
2007-11-01 14:48:41
(B) Is the answerNEC

Post A Comment!
Click here to register.
This comment is best classified as a: (mouseover)
Mouseover the respective type above for an explanation of each type.

Bare Basic LaTeX Rosetta Stone

LaTeX syntax supported through dollar sign wrappers $, ex., $\alpha^2_0$ produces .
type this... to get...
$\langle my \rangle$
$\left( abacadabra \right)_{me}$
The Sidebar Chatbox...
Scroll to see it, or resize your browser to ignore it...