A traveler in these locations will notice that baking requires adjustments for leavening agents, and boiling potatoes takes longer. At 1,600 meters (5,280 feet), the boiling point of water drops to roughly 95°C (203°F).
Water Boils at 70°C on Everest: Understanding the Science
The table below illustrates the direct correlation between decreasing atmospheric pressure and the corresponding drop in the boiling point of water. Because the atmosphere becomes thinner and less dense the higher you climb, the air pressure drops substantially, requiring less thermal energy for water to transition into a gaseous state.
Boiling Point of Water at Various Elevations Elevation (meters / feet) Approximate Boiling Point Sea Level (0m / 0ft) 100°C / 212°F. Consequently, the vapor pressure threshold is reached at a much lower temperature.
Water Boils at 70°C on Everest: Why Atmospheric Pressure Lowers the Boiling Point
Comparative Examples: Cooking at High Altitude The phenomenon observed on Everest is a scaled-up version of what many people experience in high-altitude cities like Denver or La Paz. Boiling occurs when vapor pressure, the pressure exerted by a vapor in equilibrium with its liquid or solid phase, matches the atmospheric pressure pressing down on the liquid.
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