4.50.Suppose a gas has an equation of state that resembles
a shortened version of the van der Waals equation of state:
p(V nb) nRTDerive an expression for for this gas. (See Example 4.13.)
4.51.Use equation 4.39 to determine a numerical value for
the Joule-Thomson coefficient, JT, for sulfur dioxide, SO 2 , at
25°C, assuming that it acts as a van der Waals gas. Van der
Waals constants can be found in Table 1.6.
4.52.The following table lists the compressibilities of nitro-
gen gas, N 2 , versus pressure at 300 K.
Pressure (bar) Compressibility
1 1.0000
5 1.0020
10 1.0041
20 1.0091
40 1.0181
60 1.0277
80 1.0369
100 1.0469
200 1.0961
300 1.1476
400 1.1997
500 1.2520
Source:R. H. Perry and D. W. Green,Perry’s Chemical
Engineers’ Handbook,6th ed., McGraw-Hill, New York,
1984).Evaluate the fugacity coefficient , and compare the value you
get to the value of found in Example 4.13.Exercises for Chapter 4 117Symbolic Math Exercises