problem-solution-7 - Chem. 444 Instructor: Nancy Makri...

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

View Full Document Right Arrow Icon

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

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

Unformatted text preview: Chem. 444 Instructor: Nancy Makri PROBLEM McQ 20-14 Show that 2 2 1 1 ln ln V T V S C R T V = + for a constant-pressure process if V C is taken from T 1 , V 1 to T 2 , V 2 assuming that V C is independ- ent of temperature. Calculate the value of S if one mole of N 2 (g) is expanded from 20.0 dm 3 at 273 K to 300 dm 3 at 400 K. Take P C = 29.4 JK-1 mol-1 . ( ) ( ) rev V V q C T dT C T dT PdV nRdV dS T T T T V = = + = + 2 2 1 1 2 2 1 1 ln ln T V V V T V C dT RdV T V S C R T V T V = + = + Recall P V V P C C R C C R = + =- So after the proper substitutions 1 1 30.6 S JK mol-- = PROBLEM McQ 20-15 In this problem, we will consider a two-compartment system like that in Figure 20.4, except that the two subsystems have the same temperature but different pressures and the wall that separates them is flexible rather than rigid. Show that in this case, ( 29 B B A dV dS P P T =- Interpret this result with regard to the sign of B dV when B A P P and when B A P P < ....
View Full Document

This note was uploaded on 02/08/2012 for the course CHEM 444 taught by Professor Gruebele,m during the Fall '08 term at University of Illinois, Urbana Champaign.

Page1 / 3

problem-solution-7 - Chem. 444 Instructor: Nancy Makri...

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