Lecture-11_HW4_Review

Lecture-11_HW4_Review - T hermodynamics in M aterials...

This preview shows pages 1–5. Sign up to view the full content.

Thermodynamics in Materials Engineering Mat E 212 - Course Notes R. E. Napolitano Iowa State University More on Entropy Review of Homework #4

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

View Full Document
Mat E 212 - Thermodynamics in Materials Engineering - R.E. Napolitano 4-20 Problem 4.1 A rigid container is divided into two compartments of equal volume by a partition. One compartment contains 1 mole of ideal gas A at 1 atm, and the other contains 1 mole of ideal gas B at 1 atm. (a) Calculate the increase in entropy which occurs when the partition between the two compartments is removed. (b) If the first compartment had contained 2 mole of ideal gas A, what would have been the increase in entropy when the partition was removed? (c) Calculate the corresponding increases in entropy in each of the above two situations if both compartments had contained ideal gas A.
1 mole A + 1 mole B (mixed) Mat E 212 - Thermodynamics in Materials Engineering - R.E. Napolitano 4-20 Problem 4.1 (a) Calculate the increase in entropy which occurs when the partition between the two compartments is removed. 1 mole A 1 mole B The gases are ideal and do not interact. Consider each expansion separately: T q S = T w = = 2 1 1 V V PdV T = 2 1 1 V V dV V T nRT = 1 2 ln V V nR ( 29 2 ln nR = ( 29 ( 29 2 ln 2 ln R R S S S B A Total + = + = K J 53 . 11 = ( 29 2 ln 2 R = ( 29 4 ln R =

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

View Full Document
Mat E 212 - Thermodynamics in Materials Engineering - R.E. Napolitano 4-20 Problem 4.1 The gases are ideal and do not interact. Consider each expansion separately: T q S = T w = = 2 1 1 V V PdV T = 2 1 1 V V dV V T nRT = 1
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 09/19/2010 for the course MSE 401 taught by Professor Averback during the Fall '10 term at University of Illinois at Urbana–Champaign.

Page1 / 12

Lecture-11_HW4_Review - T hermodynamics in M aterials...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online