What is the freezing point of water in Kelvin?

What is the freezing point of water in Kelvin?

• A. 273.15
• B. 0
• C. 373.15
• D. 671.67

Answer: (A)

Freezing point is tied to the Celsius value, where water freezes at 0°C under standard pressure. The Kelvin scale shifts Celsius by 273.15, with 0 K being absolute zero. So the freezing point in Kelvin is 0 + 273.15 = 273.15 K. That matches the standard freezing point. The other numbers don’t fit: 0 K is absolute zero, 373.15 K is the boiling point at 1 atm, and 671.67 K isn’t a standard reference for water’s phase change at typical conditions.

Freezing point is tied to the Celsius value, where water freezes at 0°C under standard pressure. The Kelvin scale shifts Celsius by 273.15, with 0 K being absolute zero. So the freezing point in Kelvin is 0 + 273.15 = 273.15 K. That matches the standard freezing point. The other numbers don’t fit: 0 K is absolute zero, 373.15 K is the boiling point at 1 atm, and 671.67 K isn’t a standard reference for water’s phase change at typical conditions.