Gas-law deviations

Gas Law Deviation. In the ideal solution the partial pressure, or activity, of a component was equal to the mol fraction times the vapor pressure of the pure component at the temperature in question. If the pressures are such that the vapor under these conditions does not obey the perfect-gas law, then a fugacity correction should be applied. For such a case, the Lewis and Randall rule would be... 

The ideal solution laws such as Raoult s law and Raoult s law corrected for gas law deviation are applicable to binary or multicomponent systems. They treat each component independently of any other component present t.e., the relationship between the mol fraction in the vapor and in the liquid for a given component depends only on the temperature and total pressure. In many cases, these simplified rules are not applicable, and there is interreaction between the various components. It would be particularly desirable to have a satisfactory theoretical approach to the problem of multicomponent vapor-liquid equilibria since the experimental determination for this... 

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