Molecular weight of the gas

L exposure would produce 1 ML of adsorbates if the sticking coefficient were unity. Note that a quantitative calculation of the exposure per surface atom depends on the molecular weight of the gas molecules and on the actual density of surface atoms, but the approximations inlierent in the definition of tire Langmuir are often inconsequential. 

With the grab sampling technique, a samphng probe is placed at the center of the stack, and a sample is drawn direcfly into an Orsat analyzer or a Fyrite-type combustion-gas analyzer. The sample is then analyzed for carbon dioxide and oxygen content. With these data, the diy molecular weight of the gas stream can then be calculated. 

The standard entropies of monatomic gases are largely determined by the translational partition function, and since dris involves the logarithm of the molecular weight of the gas, it is not surprising that the entropy, which is related to tire translational partition function by the Sackur-Tetrode equation,... 

The process gas of ethylene plants and methyl tertiary butyl ether plants is normally a hydrogen/ methane mixture. The molecular weight of the gas in such processes ranges from 3.5 to 14. The tliermodynamic behavior of hydrogen/methane mixtures has been and continues to be extensively researched. The gas dynamic design of turboexpanders, which are extensively used in such plants, depends on the equations of state of the process gas. Optimum performance of the turboexpander and associated equipment demands accurate thermodynamic properties for a wide range of process gas conditions. 

In process engineering, moles are used extensively in performing (lie calculations. A mole is defined as that mass of a substance that is numen cally equal to its molecular weight. Avogadro s Law states that identical volumes of gas at the same temperature and pressure contain equal numbers of molecules for each gas. It can be reasoned that these identical volumes will have a weight proportional to the molecular weight of the gas. If the mass is expressed as... 

Line 1 clears the screen and requests the input of the burst pressure of the vessel. Line 2 sets gamma to 1.4 and the absolute temperature to 300. If your pressure or temperature is different, edit the program Line 3 requests the molecular weight of the gas in the vessel. Lines 5-10 loop to perform the iteration. Line 6 iterates I ... 

Concentration The amount of a substance present in a given volume of a gas or liquid, in parts per million (ppm) or jLg m . In the case of gases, the ppm is proportional to the molecular concentration, hence the relationship between ppm and pg m " depends on the molecular weight of the gas concerned. 

Where W is weight and Rj is a specific constant for the gas involved. This is the perfect gas equation. Going one step further, by making W, in pounds, equal to the molecular weight of the gas (one mole), the formula becomes ... 

Trend changes in the molecular weight of the gas at the first-stage suction. Verify that overhead cooling and wash systems are in order. 

Below 7 MPa, the dominant variable for the compressibility factor in the PVT equation is the molecular weight of the gas. At this pressure level, the addition of ethane or propane increases the molecular weight of the gas more rapidly than the z factor decreases. Thus there is an advantage to removing ethane, propane, etc. from the gas. 

Villareal and Klinzing (1994) suggested increasing the gas density in order to reduce the minimum conveying velocity by increasing either the gas pressure or the molecular weight of the gas. 

The association of acetic acid in the vapor phase occurs so that the molecular weight of the gas indicates that it exists as dimers ... 

The initial release rate of hydrocarbon gas through a hole to the atmosphere depends on the pressure inside the equipment, the hole shape/size, and the molecular weight of the gas. 

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