Fugacities from Gas PvT Data

If we have reliable PvT dataforgas mixtures, we can compute individual species fugacities from it the calculated values are as reliable as the original PvT data. 

Example 7.5 Hougen et al. [7, p. 865] present Table 7.E of the volume residuals for gaseous mixtures of methane and -butane at 220°F, based on the experimental PvT data 

FIGURE 7.9 Finding the partial molar volume residual amethane by the method of tangent intercepts. The line is tangent to the curve at Jmethane = 0.784. Its intercept on the right hand axis is 0.6 ft / Ibmol. 

FIGURE 7.10 Partial molar volume residual of methane at 220°F and Vmethane = 0.784 for various pressures. The area under the curve = 290 psia ft /lbmol. 

FUGACITY, IDEAL SOLUTIONS, ACTIVITY, ACTIVITY COEFFICIENT 

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