What is the temperature in kelvin at which pure water freezes under standard atmospheric pressure?

• A. 373 K
• B. 100 K
• C. 273 K
• D. 0 K

Answer: (C)

Verified step by step guidance

1. Understand that the freezing point of pure water under standard atmospheric pressure (1 atm) is a well-known physical constant.
2. Recall that the freezing point of water is 0 degrees Celsius (°C).
3. Convert the temperature from Celsius to Kelvin using the formula: \(T(K) = T(^\circ C) + 273.15\).
4. Substitute the freezing point in Celsius into the formula: \(T(K) = 0 + 273.15\).
5. Recognize that the temperature in kelvin at which pure water freezes is approximately 273 K.