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Friday, January 15, 2016

WHAT IS ABSOLUTE ZERO?



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.