What is the boiling point of water in Kelvin?

The boiling point of water is 100 degrees Celsius under standard atmospheric pressure. To convert this temperature into Kelvin, you can use the formula:

[ K = °C + 273.15 ]

Applying this formula, you get:

[ K = 100 + 273.15 = 373.15 \text{ K} ]

In many contexts, 373 K is approximated to 373 K for simplicity, which reflects the boiling point of water under normal conditions. Therefore, the correct answer is indeed 373 K. The other options do not represent the boiling point of water in Kelvin. 0 K corresponds to absolute zero, 100 K is far below the boiling point of water, and 273 K is the freezing point of water.