What is the boiling point of water in Celsius?

What is the boiling point of water in Celsius?

• A. 90
• B. 100
• C. 110
• D. 120

Answer: (B)

Boiling point is the temperature at which a liquid’s vapor pressure equals the surrounding pressure, causing rapid vapor formation throughout the liquid. For water at sea level (about 1 atmosphere, or 101 kPa), this occurs at 100°C, so water boils at 100°C under standard conditions. The boiling point isn’t fixed for all situations—it shifts with pressure: higher pressure raises the boiling point, while lower pressure lowers it. In the Celsius scale, 0°C is the freezing point and 100°C is the boiling point at standard pressure, a convenient reference point to remember.

Boiling point is the temperature at which a liquid’s vapor pressure equals the surrounding pressure, causing rapid vapor formation throughout the liquid. For water at sea level (about 1 atmosphere, or 101 kPa), this occurs at 100°C, so water boils at 100°C under standard conditions. The boiling point isn’t fixed for all situations—it shifts with pressure: higher pressure raises the boiling point, while lower pressure lowers it. In the Celsius scale, 0°C is the freezing point and 100°C is the boiling point at standard pressure, a convenient reference point to remember.