Concise Physical Chemistry

c02 JWBS043-Rogers September 13, 2010 11:23 Printer Name: Yet to Come

30 REAL GASES: EMPIRICAL EQUATIONS

TABLE 2.1 Observed Real Gas Behavior

from 10 to 100 bar Expressed as (p,pVm).

p(bar) pVm(dm^3 bar)

10.0000 24.6940

20.0000 24.6100

30.0000 24.5400

40.0000 24.4820

50.0000 24.4380

60.0000 24.4070

70.0000 24.3880

80.0000 24.3830

90.0000 24.3910

100.0000 24.4120

Exercise 2.2

Given the problem that experimental values ofpVmbetween 10 and 100 bar have

been measured at intervals of 10 bar with the results in Table 2.1, find the analytical

equation that expresses these results (Fig. 2.9).

p (bar)

0 20 40 60 80 100

pV

(dm

3 bar)

24.3

24.4

24.5

24.6

24.7

24.8

FIGURE 2.9 Experimental values ofpVmvs.pfor one mole of a real gas.