van der Waals Equation and the Critical Phenomena
The isotherms obtained by plotting the curve PV = nRT are rectangular hyperbolas. Gases approximate to this isotherm at low pressures and high temperatures. The…
Chemistry
Determination of Critical Volume
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
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
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
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
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
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…
Van der Waals’ Equation of State in terms of Pressure Correction
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…
van der Waals’ Equation of State in Terms of Volume Correction
Van der Waals’ Equation of State in Terms of Volume correction The ideal gas equation has been derived from the kinetic theory of gases with…
Behavior of Real Gases: The Amagat’s Curves
The behavior of Real Gases: The Amagat’s Curves The ideal gas law equation PV = nRT is not obeyed by most gases, particularly at high…
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