One graphical representation of this equation exhibits spurious loops which imply that certain substances have negative compressibility. That region is modified by a horizontal line determined by the Maxwell equal area rule. A later modification of this equation introduced a T to the one half term in the denominator of the A parameter; that equation was introduced by Redlich and Kwong. This equation contains factors which account for the volume of individual molecules as well as the attractive forces between molecules, 
One graphical representation of this equation exhibits spurious loops which imply that certain substances have negative compressibility. That region is modified by a horizontal line determined by the Maxwell equal area rule. A later modification of this equation introduced a T to the one half term in the denominator of the A parameter; that equation was introduced by Redlich and Kwong. This equation contains factors which account for the volume of individual molecules as well as the attractive forces between molecules, its b and a terms. For 10 points, identify this equation of state, the first modification of the ideal gas law to describe real gases, which was developed by a Dutch scientist.
One graphical representation of this equation exhibits spurious loops which imply that certain substances have negative compressibility.
van der Waals Equation of State