Stoichiometry
Pick out the wrong unit conversion of mass transfer co-efficient.

1 lb/hr.ft³.atm. = 4.8182 kg/hr.m².bar
1 kg/hr.m².atm= 0.98687 kg/hr. m .bar
1 lb/hr . ft² = 4.8823 kg/hr . m²
1 kg/hr . m² = 4.8823 lb/hr . ft²

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Stoichiometry
According to Raoult's law, "The vapor pressure exerted by component in a solution is proportional to the mole fraction of that component." Raoult's law is not applicable under the following assumption/condition.

No component is concentrated at the surface of the solution
The attractive forces between like and unlike molecules are almost equal
In the formation of solution, chemical combination/molecular association between unlike molecules takes place
The component molecules are non polar and are of almost equal size

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