Water boils at 100 degrees Celsius (212 degrees Fahrenheit) at standard atmospheric pressure, which is at sea level. However, this boiling point can change based on the altitude and atmospheric pressure. At higher altitudes, for instance, where the pressure is lower, water will boil at a lower temperature.
The boiling point is the temperature at which the vapor pressure of the liquid equals the surrounding pressure. At this point, bubbles of vapor form within the liquid, causing it to turn into gas and creating the boiling effect we observe.
Understanding the boiling point of water is essential in cooking and various scientific experiments, as it influences how food is prepared and the outcomes of chemical reactions. So, while the general rule of thumb indicates 100 degrees Celsius at sea level, remember that the environment can alter this key temperature.