Liquefaction of Gases

Liquefaction of gas, Critical constants, Bonus topic

Gases possess characteristic critical temperature which depends upon the magnitude of intermolecular forces between the particles. Following are the critical tempeatures of some gases. From the above data what would be the order of liquefaction of these gases? Start writing the order from the gas liquefying first.

How does applying pressure (or compression) help in the liquefaction of a gas ?

State whether the following statements are true or false: Liquefaction of air is a chemical change.

Explain the role of temperature and pressure during the liquefaction of a gas . Do both of them play the same role ?

Assertion: Andrews worked on a temporary gas (so called at that time) and derived the condition to liquefy the permanent gases (so called at that time). Reason: Andrews studied isotherms of CO_(2) and obtained the required conditions of liquefaction of gas as T gas lt Tc (critical temperature).