Final answer:
The boiling point of water in Kelvin is 373 K, as the temperature in Celsius (100°C) is converted to Kelvin by adding 273.15.
Step-by-step explanation:
The boiling/condensation point of water in Kelvin is 373 K. When converting temperatures from Celsius to Kelvin, you add 273.15 to the Celsius value. Therefore, since the boiling point of water is 100°C, it is equivalent to 373.15 K in Kelvin. For most practical purposes, people commonly use 373 K, which is accurate to three significant figures. This makes option b) 373 K the correct answer.
A boiling point is the temperature at which a liquid turns into a vapor. At this point, the substance undergoes a phase change from liquid to gas due to increased kinetic energy of the particles overcoming the forces holding them in the liquid state.