Why do the boiling point of water decrease on climbing up the higher altitude?

Answer 1

Water usually boils at 212F or 100C at sea level. As you go higher up in the atmosphere (higher altitude), the amount of atmosphere pushing down on you decreases, hence the pressure decreases. Water boils when the vapor pressure of the water equals the atmospheric pressure. Vapor pressure increases with increasing temperature, so when there is less atmospheric pressure, a smaller vapor pressure is required to get the water boiling, hence a lower boiling temperature.

Answer 2

Boiling is when the vapor pressure of a liquid equals the atmoshperic pressure. Since at higher altitudes the atmospheric pressure is lower, the water can attain a vapor pressure equal to this lower atmospheric pressure at a lower temperature.

Answer 3

for water to change from water to a gas (to vaporise) it must break its bonds and overcome the air pressure. In space water would simply boil away immediately.

it is the air pressure which is keeping the water a liquid and not a gas, so as you go to higher elevations, naturally the boiling point begins to become lower and lower.

Answer 4

Water will evaporate at any temperature, It has a certain internal pressure due to KE of its molecules. This is called the vapor pressure. When the vapor pressure equals the external (atmospheric) pressure then the water will boil. Increasing temperature increases the vapor pressure until it equals or exceeds atmospheric pressure. The temperature when this occurs is the boiling point. If the altitude is higher, then the atmospheric pressure is less. So the temperature for the vapor pressure to equal the atmospheric pressure becomes less, so the boiling point is lower.

Answer 5

The boiling point of water decreases at higher altitudes because the atmospheric pressure is lower. As elevation increases, the atmospheric pressure exerted on the water's surface decreases, leading to a lower boiling point. This occurs because the lower pressure makes it easier for water molecules to escape into the air as vapor.

Answer 6

At higher elevations, there is less air pressure; and the boiling point of liquids varies with pressure.

Answer 7

At higher altitudes the atmospheric pressure is less when compared to that of plains. The lower atmospheric pressure results in lower boiling point of water at high altitudes.

Answer 8

At higher altitudes, the atmospheric pressure is lesser than in sea level. So water molecules need lesser energy to occur the phasechange.

Answer 9

As altitude increases pressure decreases. Using the gas law PV-nrt, as the pressure decreases so does temperature assuming no other variable changes.