At what temperature does water boil?

Water boils at 212°F (100°C) because that is the temperature at which the vapor pressure of water equals the atmospheric pressure surrounding it. As heat is applied to water, its molecules gain energy and move faster, increasing the vapor pressure. Once the vapor pressure exceeds the atmospheric pressure, water molecules transition into the gas phase, creating bubbles and causing boiling to occur. The boiling point of water can vary depending on the altitude and the presence of impurities, but under normal atmospheric conditions, water consistently boils at 212°F (100°C).