Introduction of Lab Report

        VLE stands for vapor liquid equilibrium. It is the state in which there is coexistence of the liquid and vapor state. There are two models are introduced that is used to calculate the temperature, pressure and also the composition of phases in equilibrium. The two simplest models for the vapor liquid equilibrium are the Raoul’s law and Henry’s law.  The Raoul’s law is used for the medium pressure of the ideal gas. For this law liquid phase is an ideal solution because the system is chemically similar. This means that the molecules have different size but their chemical nature is same

In this equation

    Henry’s law is used for those species of molecules whose critical temperature is extremely less than the temperature of application this means that when temperature is low this means pressure is also low, when this pressure is too low so in that case the Raoul’s law is invalid. In that case this law is applied (Benjamin & Lawler, 2013).

Methods of Lab Report

        Raoul’s law is used for ideal liquid and gas solution. The two liquids are entirely miscible with each other at all proportions that will give a single liquid. This law is used for the ideal mixture of two liquid. The ideal mixtures are those mixtures that obey Raoul’s law. In the ideal mixture there are some molecules that are present in it and these molecules are more energetic that can able to overcome the intermolecular attraction and able to escape from the surface of liquid in the form of vapors. In the case when these two liquid’s temperatures rise or fall so this mixture is not ideal  (Gerrard, 2013).

        The Raoul’s law is defined as the partial vapor pressure of a liquid or gas in a mixture that is equal to the vapor pressure of the ideal liquid and gas at any temperature rather than extreme lower temperature and it is multiplied by its mole fraction in the mixture. This law is only applied for the ideal mixtures (Nevers, 2012).

The mathematical equation for two liquid is given by

This is the equation for the two liquids that is mixed with each other

The and then partial vapor pressure of the two liquid components. Now for the mixture of two gases, each gas exerts its own pressure and this pressure is called the partial pressure and this pressure is also independent of the other gases. A mixture’s vapor pressure is equivalent to the sum of each and every single vapor pressure.

The mole faction  can be easily calculated through