The rate of loss is related to the difference between the water vapour pressure inside the produce and in the air.

The evaporation will not be increased, as air pressure means nothing, of course; only water vapor pressure.

Water vapor pressure may also affect the rate of obsidian hydration.

When growing oxides, increasing the water vapor pressure in the process gas environment will increase the oxidation growth rate.

When water vapor pressure is increased, the oxide growth rate is increased.

Similarly, the equation for the saturation water vapor pressure over ice is:

The following table is derived from ITS-90 formulations of water vapour pressure.

If you are collecting the gases over water, the water vapor pressure will impact your ability to measure the reactants.

Viktor had pointed out the biggest clue: the correlation between water vapor pressure near the site and the magnetic waves.

As for other substances, water vapour pressure is a function of temperature and can be determined with Clausius-Clapeyron relation.

Any decline in water loss might also be partly offset by the resulting increase in atmospheric water vapour pressure deficit.

If water vapour pressure in the ambient space is lower than vapour pressure within wood, desorption takes place.

However, for a given operating temperature, this growth rate is not maximized until the water vapor pressure is equal to 100% of the operating pressure.

Water vapour pressure depresses the reading of water barometers, and the magnitude of this error increases with temperature.

Water vapour pressure (hPa)

For example many food stores, like supermarkets, utilize open chiller cabinets, or food cases, which can significantly lower the water vapor pressure (lowering humidity).

The water vapour pressure is the partial pressure of water vapour in any gas mixture saturated with water.

Water vapor pressure above 100% relative humidity is called super-saturated and can occur if air is rapidly cooled, for example, by rising suddenly in an updraft.

Water vapor pressure is a function of the temperature of the water source while the overall process pressure is a function of atmosphere.

In ecology, it is the difference between the actual water vapour pressure and the saturation water vapour pressure at a particular temperature.

The following table list water vapour pressure in units of kPa and mmHg as a function of temperature in degrees Celsius.

As the atmosphere varies the oxygen pressure will increase or decrease relative to the water vapor pressure, leading to changes in the overall oxidation growth rate of the film.

The Goff-Gratch equation is one (arguably the first reliable) amongst many equations that have been proposed to estimate the saturation water vapor pressure at a given temperature.

The water vapor pressure that remains is reduced compared to pure water for two reasons: 1) there is less water present in the fluid, by a modest percentage.

Since there is only a weak dependence on temperature of the denominator of the exponent, this equation shows that saturation water vapor pressure changes approximately exponentially with .