Absolute Zero could be defined in
different ways as follows:
Absolute Zero is a state of
minimum molecular movement
Absolute zero is that temperature
at which disorder of a system reaches its minimum value.
Absolute Zero is a state of zero
Entropy.
Absolute Zero is the temperature
at which a “Heat Engine” can operate at 100 percent efficiency.
Absolute zero is the point where
no more heat can be removed from a system, according to the absolute or
thermodynamic temperature scale. This corresponds to 0 K or -273.15°C. In
classical kinetic theory, there should be no movement of individual molecules at
absolute zero.
A system at absolute zero will
not have enough energy for transfer to other systems. It is therefore correct
to say that molecular kinetic energy is minimal at absolute zero i.e; the
motion of molecules in a system is least at absolute zero
Absolute zero is defined as 0 (zero) K on the Kelvin
scale and as −273.15°C on the Celsius scale. This equates to −459.67°F on the
Fahrenheit scale.
The third law of thermodynamics
says absolute zero is not obtainable in a finite number of steps (and it is
impossible to practically have an infinite number of steps.
You couldn't send a current
through a wire at absolute zero because the electrons would not move.
The critical point when there is more resistance is
absolute zero itself.
The ideal gas law says that
PV=nRT. This means that in order for the temperature to be 0 (absolute 0), P or
V would have to be zero. An actual gas cannot have a Pressure or Volume of zero
and still have mass. This is a reason while absolute zero is unobtainable.