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138 5 SIMPLEMIXTURES
(10−2Π/c)
/(g cm−2
/g cm−3
)
c/(g cm−3
)
(10−2Π/c)
/(g cm−2
/g cm−3
)
c/(g cm−3
)
2.6 0.005 0 19.0 0.145
2.9 0.010 31.0 0.195
3.6 0.020 38.0 0.245
4.3 0.033 52 0.27
6.0 0.057 63 0.29
12.0 0.100
0.00 0.05 0.10 0.15 0.20 0.25 0.30
0
20
40
60
c/(g cm−3)
(1
0−
2 Π
/c
)/
(g
cm
−2
/g
cm
−3
)
Figure 5.7
It is evident from the graph that the data do not conform to this expecta-
tion. One approach is to select only the data at the lowest concentrations
because in this limit the expectation is that the two-term virial equation
will be su�cient to describe the data. Such a plot is shown in Fig. 5.8.
0.00 0.01 0.01 0.02 0.02 0.03 0.03 0.04
2.0
3.0
4.0
c/(g cm−3)
(1
0−
2 Π
/c
)/
(g
cm
−2
/g
cm
−3
)
Figure 5.8
�e data �t reasonably well to a straight line with intercept 2.307. From