Results of Total Pressure Calculations

The difference between the calculated results for nonideal solutions attains a maximum value at a 0.3-0.4 for all isotherms within the temperature range 373 T 623 K. The maximum difference in the total pressure predicted by the approaches of pages 344-346 is 13% at T = 373 K, 

5% at T = 523 K, 3% at T = 573 K, and 2.6% at T = 623 K. The remarkable feature of the comparison is that a good agreement between the predicted values of total pressure exists even at 573 and 623 K, i.e., in the domain where the gas-phase density is high and interaction between 

The value of total pressure predicted by the ideal-solution relationship (8.16) differs considerably from the values provided by other approaches. 

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