What is the boiling point of water on the Celsius temperature scale?

• A. 100
• B. 0
• C. 212
• D. 373

Answer: (A)

Verified step by step guidance

1. Understand that the boiling point of a substance is the temperature at which its vapor pressure equals the external atmospheric pressure, causing it to change from liquid to gas.
2. Recall that the Celsius temperature scale is based on the freezing point of water at 0°C and the boiling point of water at 100°C under standard atmospheric pressure (1 atm).
3. Identify that the boiling point of water on the Celsius scale is the temperature where water transitions from liquid to gas at 1 atm pressure.
4. Recognize that the commonly accepted boiling point of water on the Celsius scale is 100°C.
5. Confirm that the other options (0, 212, 373) correspond to different temperature scales or points: 0°C is freezing point, 212°F is boiling point in Fahrenheit, and 373 K is boiling point in Kelvin.