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ybhathena
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What does the atmospheric pressure have to be to make the boiling point of water 20 C?
Atmospheric pressure is the force exerted by the weight of the Earth's atmosphere on a unit area. It is commonly measured in units of pressure, such as pounds per square inch (psi) or pascals (Pa).
As atmospheric pressure increases, the boiling point of water also increases. This is because the higher pressure pushes down on the water molecule, making it more difficult for them to escape into the air as vapor. This results in a higher temperature needed for the water to reach its boiling point.
The standard atmospheric pressure at sea level is 101.325 kilopascals (kPa) or 1 atmosphere (atm). This is equivalent to 14.7 pounds per square inch (psi) or 760 millimeters of mercury (mmHg).
The boiling point of water at 20°C is 100°C or 212°F. This is the standard boiling point at sea level, where the atmospheric pressure is 1 atm.
As altitude increases, the atmospheric pressure decreases, resulting in a lower boiling point of water. This is because there is less pressure pushing down on the water molecules, making it easier for them to escape into the air as vapor. For every 300 meters increase in altitude, the boiling point of water decreases by approximately 1°C.