he critical temperature of CO2 is Tc = 290.8 K and the critical pressure is pc = 89.97 bar. Draw the schematic pV isotherms at 200, 209.6 and 500 K of CO2. What is the definition of the critical temperature? b. Looking at the van-der-Waals equation at the critical p
he critical temperature of CO2 is Tc = 290.8 K and the critical pressure is pc = 89.97 bar. Draw the schematic pV isotherms at 200, 209.6 and 500 K of CO2. What is the definition of the critical temperature? b. Looking at the van-der-Waals equation at the critical p
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
Problem 1.1P
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Question
a. The critical temperature of CO2 is Tc = 290.8 K and the critical pressure is
pc = 89.97 bar. Draw the schematic pV isotherms at 200, 209.6 and 500 K of CO2.
What is the definition of the critical temperature?
b. Looking at the van-der-Waals equation at the critical point, put in the critical
parameters (pc, Tc and Vc). Differentiate the equation for p(V) and determine the
coefficients a and b in dependence on the critical parameters.
c. Calculate the critical parameters for H2 with a = 0.1324 atm L2 mol-2 and
b = 0.0266 L mol-1.
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Step 1: (a) Isotherms in a P-V diagram
VIEWStep 2: (b) Critical volume( Vc) in terms of the Vander Waals constant b
VIEWStep 3: (b) Critical temperature (Tc) in terms of the Vander Waals constants and b
VIEWStep 4: (b) Critical pressure (Pc) in terms of the Vander Waals constants and b
VIEWStep 5: (c) Critical parameters for hydrogen
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