IIT JEE , AIEEE Forum - Chemistry , Physical Chemistry

arun.k.iit

why can,t gases be liquefied above critical temprature

magiclko

Gases can be converted to liquids by compressing the gas at a suitable temperature. but it becomes more difficult to liquefy them above the critical temperature because the kinetic energies of the particles that make up the gas also increase (rem'ber KE is directly proportinal to T)

iitkgp_bipin

A fluid cannot be liquified above its critical temperature because heat increases the molecular motion in the fluid.

arun.k.iit

can't v increase pressure to any magnitude

kvenkan

matter can exist in three states namely,
solid, liquid and gas. Under a given set of conditions of temperature and
pressure, which of these would be the most stable state of a given
substance depends upon the net effect of two opposing factors.
Intermolecular forces tend to keep the molecules (or atoms or ions) closer,
whereas thermal energy tends to keep them apart by making them move
faster.
increasing temperature increases thermal energy.
increasing pressure increases the intermolecular forces.
But above a certain temperature called critical temperature the effect of thermal energy outweighs the effect of intermolecular forces however high the pressure may be.
thus we cannot liquify a gas above its critical temperature.

please rate me.

arun.k.iit

AS U SAID IF PRESS INCREASES INTER MOLECULAR FORCES WHY CAN'T IT B INCREASED

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