Multiple choice

The boiling point of water

  1. Is always 100°C

  2. Depends on atmospheric pressure

  3. Depends on the material of the container

  4. Depends on relative humidity
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

The boiling point of water is 100°C only at standard atmospheric pressure (1 atm or 101.3 kPa). At higher altitudes or lower pressure, water boils at a lower temperature because less energy is needed for water molecules to escape into the gas phase.

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