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ChE 263
Assignment #4
(Excel HW#4)
Save Homework Assignment as NameSectionHW# (i.e. “Brad Bundy  Sect 2 – HW#4.xlsx”).
Email finished assignment to David McClellan (TA) at
david.263ta@gmail.com
.
The
assignment is due
before
the beginning of the next class period.
Highlight the solution to each
problem and solve each problem in a different worksheet.
1.
(Competencies 5.2, 6.1; 45 points)
Before you start this problem, please review the key
to the inclass problem.
It will help prevent some problems.
The Redlich/Kwong Equation of State is
)
(
2
1
b
V
V
T
a
b
V
RT
P
where T is the temperature, V is the molar volume, R is the universal gas constant, and
a
and
b
are compoundspecific constants.
Find the molar volume of ethane for each phase
that is present at
T = 77 °C and P = 1 bar.
For ethane,
a
= 2.877×10
8
cm
6
bar K
0.5
mol
2
and
b
= 60.211 cm
3
mol
1
.
Hints:
Remember our class discussion on finding the roots of an EOS (use the ideal gas
to obtain the guess of the vapor volume and 1.1*b to obtain the guess for the
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 Fall '11
 BradBundy

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