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A gas pycnometer is a laboratory device used for measuring the density—or, more accurately, the volume—of solids, be they regularly shaped, porous or non-porous, monolithic, powdered, granular or in some way comminuted, employing some method of gas displacement and the volume:pressure relationship known as Boyle's law.
Boyle's law demonstrations. The law itself can be stated as follows: For a fixed mass of an ideal gas kept at a fixed temperature, pressure and volume are inversely proportional. [2] Boyle's law is a gas law, stating that the pressure and volume of a gas have an inverse relationship. If volume increases, then pressure decreases and vice versa ...
A glass McLeod gauge, drained of mercury. A McLeod gauge is a scientific instrument used to measure very low pressures, down to 10 −6 Torr (0.133 mPa).It was invented in 1874 by Herbert McLeod (1841–1923). [1]
Boyle's law states that at a constant temperature, volume (V) and pressure (P) are inversely related. Therefore, when a constant temperature is maintained (isothermal conditions), Boyle's law can be applied. Consequently, most early plethysmographs required temperature-controlled surroundings and isothermal conditions within the test chamber. [1]
Buys Ballot's law, which was first deduced by the American meteorologists J.H. Coffin and William Ferrel, is a direct consequence of Ferrel's law. The law takes its name from C. H. D. Buys Ballot , a Dutch meteorologist, who published it in the Comptes Rendus , 9 November 1857.
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The laws describing the behaviour of gases under fixed pressure, volume, amount of gas, and absolute temperature conditions are called gas laws.The basic gas laws were discovered by the end of the 18th century when scientists found out that relationships between pressure, volume and temperature of a sample of gas could be obtained which would hold to approximation for all gases.
Experiments in 1659 by Robert Boyle of the Royal Society were made using a barometer underwater, and led to Boyle's law. [1] The French physicist, mathematician and inventor Denis Papin published Recuiel de diverses Pieces touchant quelques novelles Machines in 1695, where he proposed a depth gauge for a submarine. [2]