The equation of state, findings show pressure is a


The equation can explain liquid-condensation
phenomenon – specifically for compressed gas condensing into liquid. Graphical
illustrations and mathematical expressions show the exact occurrence of
coexistence between the two phases. By mathematically manipulating Waals equation
of state, findings show pressure is a convex function of temperature, phase
coexistence is delineated in the graph below. Tc represents critical
temperature, at that point, pressure and temperature are said to be at a mutual
critical point. This point is mathematically expressed as: 0
and .10-11
Further differentiating this equation relative to volume gives a measure of repulsive
force b. Mathematically expressed as:  and .12-13
Attractive force a and repulsive
force b are deduced to value  and  respectively.14


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