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Thermodynamics II (CHBE 3130A) Spring 2016
Lecture: TR at 8:05 AM 9:25 AM in ES&T L1255
Recitation (optional): W 5:15-6:15 PM Room: ES&T L1255
Instructor: Professor Ryan Lively, email@example.com, 404.894.8795
Osmotic Equilibrium Homework Problems
1) One important application of osmometry is the measurement of the molecular mass of
large polymeric molecules.
(a) Show how the pressure expression we derived in class can be rearranged in ter
Answer the following questions based on the phase diagram given below representing the solidliquid equilibrium between two species, 1 and 2.
1) Label the white spaces on the phase diagram with L, L-S1, L-S2, S1-S2
2) What is the eut
P = x1RT/V2 = (n1/n)RT/V = (m1/M1)RT/Vt = (m1/Vt)RT/M1 = c1RT/M1
using these definitions:
x1 = n1/n
n1 = m1/M1
Vt = n*V
where n1 = # moles 1
M1 = molecular mass 1
m1 = mass 1
Vt = total volume
c1 = mass per unit volume
Constants or Given
16.1154 3483.67 205.807 From Appendix B.2
230.17 Antoine constants
1.987 cal/mol K
CHbE 5\50A SLE So\r\'\'0n$
Provz M We condition 2); =1. corresponds +0 compkcc
imisabduhj -For all gpeu'cs m m soLd state.
Consvchx a, leshan of N 509ml P110993 at zqw'h'bnum ) we have -.
zx5* zbr-. = zx
Wkuc d,P,.1\l owe Pkwy;
+ Lad. pure sp
ThedatabelowareforCO2adsorptionat25 Conanactivatedcarbonporoussolid*. Using
and the surface area (m2/g) of the activated carbon. What are the uni
Homework 7 Solution
ChBE 3130 Thermodynamics II
September 12, 2013
Problem 11.25(b). This problem is an extension of Eq. (11.68) for mixtures. Note that (1)
the problem requires assuming an ideal mixture with generalized reduced quantities
which is an analog of the Case I SLE equations.
xi i = xi i
(i = 1, 2)
If phase is pure species 1 and phase is pure species 2, then x1 = 1 = 1 and x2 = 2 = 1.
x1 1 = x1 1 = 1
x2 2 = x2 2 = 1
The reasoning applies general
The Langmuir model is inverted : 1/n = 1/(mkP) + 1/m
this suggests a plot of 1/n versus 1/P will yield a slope of 1/mk and intercept of 1/m.
k = Henry's or equilibrium adsorption constant
m = moles available adsorption sites per kg adsorbent-> c