Which of the following best describes the freezing point of pure water at standard atmospheric pressure?

• A. -10 ^ext{o} ext{C}
• B. 0 ^ext{o} ext{C}
• C. 100 ^ext{o} ext{C}
• D. 32 ^ext{o} ext{C}

Answer: (B)

Verified step by step guidance

1. Recall that the freezing point of a substance is the temperature at which it changes from liquid to solid under standard atmospheric pressure (1 atm).
2. For pure water, the freezing point is a well-established physical property and is commonly used as a reference point in temperature scales.
3. Understand that at 1 atm pressure, pure water freezes at 0 degrees Celsius, which means it transitions from liquid to solid at this temperature.
4. Recognize that temperatures like -10 °C or 32 °C do not correspond to the freezing point of pure water under standard conditions; -10 °C is below freezing, and 32 °C is above freezing.
5. Therefore, the best description of the freezing point of pure water at standard atmospheric pressure is 0 °C.