Absolute zero is the lowest possible temperature of a gas.
Explanation:
<em>Absolute zer</em>o is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance.
<em>Absolute zero </em>is the point at which the fundamental particles of nature have minimal vibrational motion, retaining only quantum mechanical, zero-point energy-induced particle motion.
<em>By international agreement</em>, absolute zero is defined as precisely; 0 K on the Kelvin scale, which is a thermodynamic (absolute) temperature scale; and –273.15 degrees Celsius on the Celsius scale.