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Online calculator, figures and tables showing density, specific weight and thermal expansion coefficients of air at temperatures ranging -100 to 1600 °C (-140 to 2900 °F) at atmospheric and higher pressure - Imperial and SI Units.
- Moist Air
Density of Moist Air - an Air Vapor Mixture. The amount of...
- Oxygen
Online calculator, figures and table showing density and...
- Specific Heat Ratio
Dry air is a mechanical mixture of nitrogen, oxygen, argon...
- Mole Fraction of Water Vapor
Moist Air - Water Vapor and Saturation Pressure Saturation...
- Humid Air Vs. The Ideal Gas Law
Air Pressure. Daltons Law states that. the total pressure...
- Specific Volume
The ideal gas law can also be applied to the water vapor as....
- Moist Air
Humidity is the concentration of water vapor present in the air. Water vapor, the gaseous state of water, is generally invisible to the human eye. [2] Humidity indicates the likelihood for precipitation, dew, or fog to be present. Humidity depends on the temperature and pressure of the system of interest.
Parts per million - ppm - is commonly used as a dimensionless measure of small levels (concentrations) of pollutants in air, water, body fluids, etc. Parts per million is the molar mass, volume or mass ratio between the pollutant component and the solution.
A related measure of concentration is the mass concentration ρX, representing the mass of X per unit volume of air (we will also use ρX to denote the mass density of a body, i.e., its mass per unit volume; the proper definition should be clear from the context). ρX and nX are related by the molecular weight MX (kg mol-1)ofthe gas: (1.8)
In the atmosphere, it is common to use concentration units of mass/volume air such as mg/m 3 and µg/m 3. In water mass/volume concentration units of mg/L and µg/L are common. In most aqueous systems, ppm is equivalent to mg/L. This is because the density of water is approximately 1000 g/L.
To turn that into volume of water per volume of air (air is different from dry air), you'll have to do a little math and unit conversion. You can use 1.2 kg/m³ as the density of dry air (at 20°C) if it helps.
27 lis 2020 · The Antoine equation will allow you to calculate the vapor pressure of water at a given temperature, which will allow you to calculate the partial pressure of water at 100% relative humidity.
