Final answer:
Absolute zero is the lowest possible temperature where all molecular motion stops, equal to 0 K, -273.15°C, or -459.67°F. It cannot actually be reached. Water freezes at 0°C and boils at 100°C in the Celsius scale, and converting Kelvin to Celsius involves subtracting 273.15.
Step-by-step explanation:
Absolute zero is the theoretical temperature at which all molecular motion ceases. In terms of the Kelvin absolute temperature scale, absolute zero is 0 K, which also corresponds to -273.15°C on the Celsius scale, and -459.67°F on the Fahrenheit scale. The concept of absolute zero is fundamental in physics since it represents the lower limit to the temperature that can be reached.
On the Celsius temperature scale, the freezing point of water is 0°C, and the boiling point is 100°C at 1 atmosphere of pressure. Although it's theoretically impossible to reach absolute zero, understanding this concept helps in studying the behavior of gases and their extrapolation to zero pressure.
To convert a temperature from Kelvin to Celsius, you subtract 273.15 from the Kelvin temperature. For example, 0 K is the absolute minimum, which is equivalent to -273.15°C.