What is the boiling point of water in Kelvin?

The boiling point of water is 100 degrees Celsius, which is the standard temperature at which water transitions from a liquid to a gas at standard atmospheric pressure. To convert this temperature to Kelvin, you add 273.15 to the Celsius temperature. Therefore, the calculation is:

100 degrees Celsius + 273.15 = 373.15 K

For practical purposes, this is often approximated as 373 K. Thus, the boiling point of water in Kelvin is accurately represented by the choice that indicates 373K. This value is critical in various scientific contexts, particularly in thermodynamics and physical chemistry, as it provides a standard reference for understanding phase changes of water across different temperature scales.