1 Ideal Gas Law - In perfect or ideal gas the change in density is directly related to the change of temperature and pressure as expressed by the Ideal Gas Law.  Water and Liquids - Critical Pressure Ratios - Critical pressure ratios for water and other liquids.
The 2016 Winfield, Illinois, population is 9,657. There are 3,228 people per square mile (population density).
Herrin is located in Williamson County in Illinois. 1  Population: 12,524. 2  Area: 9.47 sq. miles Land Area: 9.24 sq. miles. Water Area: 0.23 sq. miles. 3  Population Density: 1,323.05 people per sq. mile.  Elevation: 419.62 1  ft. Time Zone: Central Standard Time (GMT 2  -6) Daylight Savings:  Yes.