What Happens at Absolute Zero Temperature?

[Amith2006]

Sir,
Absolute zero temperature is defined as the temperature at which a reversible isothermal process does not involve exchange of heat. Can you please explain this to me? Also it is said that at absolute zero temperature the pressure and volume of a gas is zero. How is it possible?

 

[ptabor]

From the Ideal Gas Law, PV = nRT, you know that if T is zero so must be the product of P and V. I would argue to say that the pressure exerted by the gas on the container is zero.

Actually, it MUST occupy some volume. The individual molecules themselves are of some definite (although small) dimensions.