What Is the Boiling Point of Water?

Boiling water
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The boiling point of water is 100 C or 212 F at 1 atmosphere of pressure (sea level).

However, the value is not a constant. The boiling point of water depends on the atmospheric pressure, which changes according to elevation. The boiling point of water is 100 C or 212 F at 1 atmosphere of pressure (sea level), but water boils at a lower temperature as you gain altitude (e.g., on a mountain) and boils at a higher temperature if you increase atmospheric pressure (lived below sea level).

The boiling point of water also depends on the purity of the water. Water which contains impurities (such as salted water) boils at a higher temperature than pure water. This phenomenon is called boiling point elevation, which is one of the colligative properties of matter.

Learn More

Freezing Point of Water
Melting Point of Water
Boiling Point of Milk

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Helmenstine, Anne Marie, Ph.D. "What Is the Boiling Point of Water?" ThoughtCo, Jan. 15, 2018, thoughtco.com/what-is-the-boiling-point-of-water-607865. Helmenstine, Anne Marie, Ph.D. (2018, January 15). What Is the Boiling Point of Water? Retrieved from https://www.thoughtco.com/what-is-the-boiling-point-of-water-607865 Helmenstine, Anne Marie, Ph.D. "What Is the Boiling Point of Water?" ThoughtCo. https://www.thoughtco.com/what-is-the-boiling-point-of-water-607865 (accessed February 25, 2018).