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  2. Argon - Wikipedia

    en.wikipedia.org/wiki/Argon

    Argon constitutes 0.934% by volume and 1.288% by mass of Earth's atmosphere. [23] Air is the primary industrial source of purified argon products. Argon is isolated from air by fractionation, most commonly by cryogenic fractional distillation, a process that also produces purified nitrogen, oxygen, neon, krypton and xenon. [24]

  3. Oxygen–argon ratio - Wikipedia

    en.wikipedia.org/wiki/Oxygen–argon_ratio

    where (∆O 2)/Ar is the difference between O 2 production via photosynthesis and removal via respiration, c is the concentration of dissolved gas and c sat is the saturated concentration of the gas in water at a specific temperature, salinity and pressure. [3] Oxygen and argon concentrations can be compared using samples from water systems ...

  4. Gas composition - Wikipedia

    en.wikipedia.org/wiki/Gas_composition

    The standards below are two examples of commonly used and cited publications that provide a composition for standard dry air: ISO TR 29922-2017 provides a definition for standard dry air which specifies an air molar mass of 28,965 46 ± 0,000 17 kg·kmol-1. [2] GPA 2145:2009 is published by the Gas Processors Association.

  5. Partial pressure - Wikipedia

    en.wikipedia.org/wiki/Partial_pressure

    The atmospheric pressure is roughly equal to the sum of partial pressures of constituent gases – oxygen, nitrogen, argon, water vapor, carbon dioxide, etc.. In a mixture of gases, each constituent gas has a partial pressure which is the notional pressure of that constituent gas as if it alone occupied the entire volume of the original mixture at the same temperature. [1]

  6. Air separation - Wikipedia

    en.wikipedia.org/wiki/Air_separation

    Because the boiling point of argon (87.3 K at standard conditions) lies between that of oxygen (90.2 K) and nitrogen (77.4 K), argon builds up in the lower section of the low pressure column. When argon is produced, a vapor side draw is taken from the low pressure column where the argon concentration is highest.

  7. Gas blending - Wikipedia

    en.wikipedia.org/wiki/Gas_blending

    The machine is usually supplied with oxygen (O 2) and nitrous oxide (N 2 O) from low pressure lines and high pressure reserve cylinders, and the metered gas is mixed at ambient pressure, after which additional anesthetic agents may be added by a vaporizer, and the gas may be humidified. Air is used as a diluent to decrease oxygen concentration.

  8. Paschen's law - Wikipedia

    en.wikipedia.org/wiki/Paschen's_law

    This is 327 V in air at standard atmospheric pressure at a distance of 7.5 μm. The composition of the gas determines both the minimal arc voltage and the distance at which it occurs. For argon, the minimal arc voltage is 137 V at a larger 12 μm.

  9. Ideal gas law - Wikipedia

    en.wikipedia.org/wiki/Ideal_gas_law

    Isotherms of an ideal gas for different temperatures. The curved lines are rectangular hyperbolae of the form y = a/x. They represent the relationship between pressure (on the vertical axis) and volume (on the horizontal axis) for an ideal gas at different temperatures: lines that are farther away from the origin (that is, lines that are nearer to the top right-hand corner of the diagram ...