Gas Law

The Equation of the Corresponding States Using the values of a from equation 3Vc = (b + RTc/Pc); 3Vc2 = (a/Pc); Vc3 = (ab/Pc); b…

At the critical temperature, the boundary between the liquid phase and gas phase disappears and the densities of the substance in the two phases are…

The isotherms obtained by plotting the curve PV = nRT are rectangular hyperbolas. Gases approximate to this isotherm at low pressures and high temperatures. The…

The critical volume is more difficult to determine. It is obtained with the help of a rule known as the law of rectilinear diameter discovered…

Determination of Critical Constants Long before Andrews performed his experiments with carbon dioxide, Caignard de La Tour (1822) observed that when ether was heated in…

Andrews’ Experiments with Carbon Dioxide (CO2) From 1861 to 1870 Andrews carried out his famous experiments on the effect of temperature and pressure on the…

Change of State: Gas-liquid Transition The kinetic theory of matter suggests that when a gas is subjected to high pressure the molecules will be brought…

Heike Kamerlingh Onnes Equations of State Many other equations of state have been proposed at different times. None of those were, however, entirely satisfactory; neither…

Significance and Limitations of van der Waals Equation The success of the van der Waals equation lies in the fact that it can explain the…

Modification of  Ideal Gas Equation: Van der Waals’ Equation of State The ideal gas equation has been derived from the kinetic theory of gases with…