For a vapor bubble to expand, the temperature must be high enough that the vapor pressure exceeds the ambient pressure (the atmospheric pressure, primarily).

At a given temperature, a substance with higher vapor pressure vaporizes more readily than a substance with a lower vapor pressure.

Measurement and units Vapor pressure is measured in the standard units of pressure.

As the vapor pressure increases, the concentration of vapor of the flammable liquid in the air increases.

So when water molecules (water vapor) are added to a given volume of air, the dry air molecules must decrease by the same number, to keep the pressure or temperature from increasing.

Seeds triggering the conversion of vapor are referred to as condensation nuclei, as in the case of water vapor.

Unlike warm water vapor, previously detected near forming stars, cold water vapor would be capable of forming comets which then could bring water to inner planets, as is theorized for the origin of water on Earth.

Humidity is the amount of water vapor in the air.

The normal boiling point of a liquid is the temperature at which the vapor pressure is equal to normal atmospheric pressure.

Mechanism Every liquid has a vapor pressure, which is a function of that liquid's temperature.

As water vapor condenses, latent heat is released into the air parcel.

Ice also appears colorless, and water vapor is essentially invisible as a gas.

Experimental measurement of vapor pressure is a simple procedure for common pressures between 1 and 200 kPa.

The water vapor is condensed, leaving pure carbon dioxide, which can then be sequestered.

The gaseous phase of water is known as water vapor (or steam), and is characterized by water assuming the configuration of a transparent cloud.

Liquid water is evaporated on the cooling fins, releasing the vapor into the cooled area.

For he draws up the drops of water, which distill in rain from his vapor,

This is because of the condensation of water vapor in the air parcel due to expansion cooling.

Water vapor is consistently the most common volcanic gas, normally comprising more than 60 of total emissions.

This augments the natural process, where sea salt from the oceans provides water vapor with the cloud condensation nuclei.

When the air reaches a high altitude, where the temperature is low, water vapor condenses into clouds, which rain onto the Earth's surface, completing the water cycle.

When surface temperature drops, eventually reaching the dew point, atmospheric water vapor condenses to form small droplets on the surface.

The force pushing the water towards the low pressure region is called the pressure gradient force.

The stoma complex regulates the exchange of gases and water vapor between the outside air and the interior of the leaf.

It has a composition of 78 nitrogen and 21 oxygen, with trace amounts of water vapor, carbon dioxide and other gaseous molecules.

The osmotic pressure of ocean water is about 27 atm.

At the elevated pressure in the bottle, more carbon dioxide can dissolve in water than at atmospheric pressure.

Dry air does not have as much water vapor, therefore dry air cools at a higher rate with vertical movement than moist air.

When heating a liquid consisting of two or more components, the bubble point is the temperature (at a given pressure) where the first bubble of vapor is formed.

Reduced population growth means less pressure on land, water, and biodiversity.

Pressure on water resources due to increased crop intensity brings about increased water resource competition in areas where water resources are scarce.

Moist air has more water vapor than dry air, so more latent heat is released into the parcel of moist air as it rises.

On 20 October 2011, it was reported that oceans worth of cold water vapor had been discovered in the accretion disc of a young star.

The filter works more quickly when the water supplied is under pressure.

The water to be purified is placed in a chamber and put under an amount of pressure greater than the osmotic pressure exerted by the water and the solutes dissolved in it.

Pressure in an urban water system is typically maintained either by a pressurised water tank serving an urban area, by pumping the water up into a water tower and relying on gravity to maintain a constant pressure in the system or solely by pumps at the water treatment plant and repeater pumping stations.

Ground frost refers to the various coverings of ice produced by the direct deposition of water vapor on objects and trees, whose surfaces have a temperature below the freezing point of water (0 C, 32 F).

This may include concentrating the product, formulation revision (i.e., addition of components to increase stability, preserve appearance, and or improve processing), decreasing a high vapor pressure solvent, or increasing the surface area.

His New Tables and Diagrams for Water Vapor , first published in 1906, appeared in six further editions through 1932, as he updated it to reflect new developments.

Hydrostatic pressure can be analyzed by the height of a water column, which effectively yields the pressure at a given depth of the column.

There is population pressure and economic pressure related to cattle raising, for instance and competition for ever scarcer resources, such as land and water.

Water supply service quality has many dimensions continuity water quality pressure and the degree of responsiveness of service providers to customer complaints.

The supply of water was derived from a natural head of water, the water mains, or a specialised high pressure water supply such as that provided by the London Hydraulic Power Company.

Closed cup testers normally give lower values for the flash point than open cup (typically lower) and are a better approximation to the temperature at which the vapor pressure reaches the lower flammable limit.

In the first century A.D., a secret mechanism operated by water pressure moved the stone.