What is the standard condition for boiling water in degrees Celsius?

The standard condition for boiling water is 100° Celsius, which is the temperature at which water transitions from a liquid to a gas at sea level, where atmospheric pressure is approximately 101.3 kPa (kilopascals). At this temperature, the vapor pressure of water equals the surrounding atmospheric pressure, allowing bubbles of vapor to form within the liquid. This phenomenon is crucial for various applications, including cooking and industrial processes.

In contrast, the other temperatures listed do not represent boiling for water under standard atmospheric conditions. For instance, 0° Celsius is the freezing point of water, and 50° Celsius is below the boiling point, resulting in water remaining in a liquid state. Similarly, 90° Celsius is also below the boiling point, and while water can reach this temperature when heated, it will not boil until it reaches 100° Celsius.