Air pressure affects the temperature at which water boils. At higher altitudes, air pressure is lower, and water boils at a temperature below 100 oC (212°F).
A rather non-obvious element is the smoothness of the container in which the water is heated. The first irregularity in the surface (or dirt within otherwise clean water) will constitute a nidus-- and that is where the first bubbles will appear; theoretically, an ultra-smooth pan could super-heat clean water, well-above the normal boiling point temperature!
temperature
Water boils at 373.15 Kelvin.
Water boils at 373.15K.
Air pressure affects the temperature at which water boils. At higher altitudes, air pressure is lower, and water boils at a temperature below 100 oC (212°F).A rather non-obvious element is the smoothness of the container in which the water is heated. The first irregularity in the surface (or dirt within otherwise clean water) will constitute a nidus-- and that is where the first bubbles will appear; theoretically, an ultra-smooth pan could super-heat clean water, well-above the normal boiling point temperature!
To test if adding salt to water increases the boiling point of the water, do the following: boil a sample of pure water until it boils. Measure the temperature at which the pure water boils. Take another sample of pure water and add salt to it, then boil this sample under the same conditions. Measure the temperature at which the salt water boils. If the latter temperature is higher, salt does increase the boiling point of water.
Temperature, salinity, and pressure.
temperature
Water boils at 373.15 Kelvin.
Water boils at 373.15K.
Air pressure affects the temperature at which water boils. At higher altitudes, air pressure is lower, and water boils at a temperature below 100 oC (212°F).A rather non-obvious element is the smoothness of the container in which the water is heated. The first irregularity in the surface (or dirt within otherwise clean water) will constitute a nidus-- and that is where the first bubbles will appear; theoretically, an ultra-smooth pan could super-heat clean water, well-above the normal boiling point temperature!
212
To test if adding salt to water increases the boiling point of the water, do the following: boil a sample of pure water until it boils. Measure the temperature at which the pure water boils. Take another sample of pure water and add salt to it, then boil this sample under the same conditions. Measure the temperature at which the salt water boils. If the latter temperature is higher, salt does increase the boiling point of water.
Besides temperature, atmospheric pressure significantly affects the boiling point of water. At higher elevations, where atmospheric pressure is lower, water boils at a temperature lower than 100°C (212°F). Conversely, in a pressure cooker, where pressure is increased, water can boil at temperatures above 100°C. This relationship is explained by the fact that boiling occurs when the vapor pressure of the liquid equals the surrounding pressure.
The boiling point of water decreases with altitude, so the temperature at which water boils would be lower at a Himalayan peak compared to the seashore. This is because air pressure decreases with increasing altitude, which affects the boiling point of water.
Water boils at 100 degrees Celsius on the Celsius temperature scale.
at normal atmospheric temperature (in plains) it boils at 100oC
Temperature is the primary factor that affects the amount of water air can hold. Warmer air can hold more water vapor than cooler air. The relationship between temperature and water vapor capacity is known as the Clausius-Clapeyron equation.