Water boils at 100°C under 1 atm of pressure. Increasing pressure raises the boiling point, while decreasing pressure lowers it. This relationship is crucial for understanding cooking methods like those in a pressure cooker.
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Pressure does not boil water , temperature does.
However, pressure determines the boiling temperature of water.
At sea level ( ~ one atmosphere) water boils at 212 ° F or 100° C. ;