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# DALTON’S LAW OF PARTIAL PRESSURES

 This states that the pressure exerted by a mixture of gases is equal to the sum of the separate pressures which each gas would exert if it alone occupied the whole volume.

## Related Terms

### PARTIAL PRESSURE

The individual pressure exerted by a gaseous constituent in a vapor mixture as if the other constituents were not present. This pressure cannot be measured directly but is obtained firstly by analysis of the vapor and then by calculation using Dalton’s Law.

### FLAMMABLE GASES

A product, material or substance falls into this division if it is a Compressed Gas (Class A) and at normal atmospheric pressure forms a flammable mixture with air.

### RATIO OF SPECIFIC HEATS (k)

Also known as isentropic coefficient. Is equal to the quotient of the heat capacity at constant pressure and the heat capacity at constant volume. (Cp/Cv). This parameter is tabulated for many pure components at standard conditions, but is technically dependent on the gas composition and temperature. The values are dimensionless and range from 1.0 to 1.6.

### MAXIMUM WORKING AREA

[INDENG] That portion of the working area that is readily accessible to the hands of a worker when in his normal states that the difference between the specific heat of a gas at constant pressure and its specific heat at constant volume is equal to the gas constant divided by the molecular weight of the gas.

### COMPRESSOR STATION

A permanent facility which increases the pressure on gas to move it in transmission lines or into storage.

### VACUUM SEPARATOR

A separator that utilizes subatmospheric pressure to remove certain gases and liquids from another liquid because of their difference in vapor pressure.

### GAS VOLUME FRACTION (GVF)

The gas volume flow rate, relative to the multiphase volume flow rate, at the pressure and temperature prevailing in that section. The GVF is normally expressed as a percentage.

### GAS-OIL-RATIO (GOR)

The gas volume flow rate, relative to the oil volume flow rate, both converted to volumes at standard pressure and temperature.

### BUBBLE TEST

Measurement of the largest opening in the mesh of a filter screen; determined by the pressure needed to force air or gas through the screen while it is submerged in a liquid.

### GAY-LUSSACS LAW

At constant pressure the volume of gas is directly proportional to its absolute temperature.

### Related questions

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