Dumas’ Method in Density of Gases

Dumas’ Method in Density of Gases

Dumas’ method It is used for substances which are liquid at room temperature. The apparatus is shown in (Figure: Dumas’ method for determination of density…
Application of the Principle of Adiabatic Demagnetization

Application of the Principle of Adiabatic Demagnetization

The principle of cooling by adiabatic demagnetization was suggested by P. Debye (1926) and W. F. Giauque (1927). When a substance is placed in a…
Density of Gases in Molecular Mass

Density of Gases in Molecular Mass

Density of Gases in Molecular Mass The density of a gas is defined in Physical Chemistry as the mass in g of 1 L of…
Adiabatic Expansion of Cold Compressed Gas

Adiabatic Expansion of Cold Compressed Gas

Adiabatic expansion of cold compressed gas for liquefying gases enjoyed considerable popularity at one time for producing liquid air. The principle is that when a…
Application of the Joule-Thomson Effect

Application of the Joule-Thomson Effect

Joule-Thomson effect was utilized to liquefy gases. When a highly compressed gas is allowed to expand through a vale or throttle into a region of…
Rapid Evaporation of Volatile Liquids

Rapid Evaporation of Volatile Liquids

Cooling by rapid evaporation of volatile liquids depends on the fact that when the liquid evaporates it takes up its latent heat of evaporation from…
Use of Freezing Mixtures in Attaining Low Temperature

Use of Freezing Mixtures in Attaining Low Temperature

Freezing mixtures a mixture (as of salt and ice or of dry ice and acetone) for producing intense cold. Freezing mixtures are useful for producing…
Liquefaction of Gases – the Basic Principles

Liquefaction of Gases – the Basic Principles

Liquefaction of Gases — the Basic Principles Liquefaction of gases is an exercise that had attracted the attention of scientists from very early times. As…
Equation of the Corresponding States

Equation of the Corresponding States

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

Continuity of State

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…
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