At which temperature does pure water freeze under standard atmospheric pressure?

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

Answer: (D)

Verified step by step guidance

1. Understand that the freezing point of a substance is the temperature at which it changes from liquid to solid under a given pressure.
2. Recognize that for pure water at standard atmospheric pressure (1 atm), the freezing point is a well-established physical property.
3. Recall that the freezing point of pure water is defined as 0~^\text{o}~\text{C}, which is the temperature where water and ice coexist in equilibrium.
4. Note that temperatures like -10~^\text{o}~\text{C} and 32~^\text{o}~\text{C} do not correspond to the freezing point of pure water; 32~^\text{o}~\text{C} is actually the boiling point in Fahrenheit scale, not Celsius.
5. Therefore, the correct temperature at which pure water freezes under standard atmospheric pressure is 0~^\text{o}~\text{C}.