What is the boiling point of water in Kelvin?

What is the boiling point of water in Kelvin?

• A. 273.15
• B. 373.15
• C. 453.15
• D. 500

Answer: (B)

The key idea here is converting temperatures between Celsius and Kelvin and knowing the boiling point of water at standard atmospheric pressure. Water boils at 100°C when the pressure is 1 atmosphere. To convert Celsius to Kelvin, add 273.15, so 100°C corresponds to 373.15 K. The other numbers don’t match the boiling point at standard pressure: 273.15 K is the freezing point (0°C), 453.15 K is 180°C, and 500 K is about 226.85°C. Therefore, the boiling point of water in Kelvin is 373.15.

The key idea here is converting temperatures between Celsius and Kelvin and knowing the boiling point of water at standard atmospheric pressure. Water boils at 100°C when the pressure is 1 atmosphere. To convert Celsius to Kelvin, add 273.15, so 100°C corresponds to 373.15 K. The other numbers don’t match the boiling point at standard pressure: 273.15 K is the freezing point (0°C), 453.15 K is 180°C, and 500 K is about 226.85°C. Therefore, the boiling point of water in Kelvin is 373.15.