liquefaction of gases

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

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).

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.

Gases posses characteristic critical temperature which depends upon the magnitude of intermolecular forces between the particles. Following are the critical temperatures of some gases. {:("Gases",H_(2),He,O_(2),N_(2)),("Critical temperature in kelvin",33.2,5.3,154.3,126):} From the above data what would be the order of liquefaction of these gases ? Start writing the order from the gas liquefying first

Liquefaction of gas, Critical constants, Bonus topic