Question

Absolute zero is the lowest possible temperature where nothing could be colder and no heat energy remains in a substance. This means that the molecules are barely vibrating. Internationally, it has been agreed that absolute zero is equivalent to 0K on the Kelvin scale, or -273.15 degrees Celsius. Change the temperature unit of measurement to Kelvins (K). Use the temperature switch to lower the temperature to as close to absolute zero (0K) as possible. What do you observe?

Answer 1

Absolute zero is the temperature where molecular motion and heat energy in a substance are minimized, theoretically reaching zero. It corresponds to 0K on the Kelvin scale, which is directly proportional to the average kinetic energy of the particles. While achieving absolute zero in the laboratory is impossible, it remains a crucial reference point in thermodynamics.

Step-by-step explanation:

Absolute Zero and Kelvin Scale

Absolute zero is theoretically the coldest temperature possible, where a substance has no heat energy and the molecular motion of its particles ceases. This temperature is universally recognized as 0K on the Kelvin scale or -273.15 degrees Celsius. The Kelvin scale, which starts at this lowest possible temperature, is used in scientific communities, particularly in fields like astronomy. At Absolute zero or 0K, gases are expected to first liquefy and then freeze, though achieving this temperature in a laboratory setting is not possible. Notably, the Kelvin scale and the Celsius scale are directly related; 0K is -273.15°C, and the boiling and freezing points of water are 373.15K and 273.15K, respectively.