Gas boiling points

TABLE 27.2 Cryogenic Gases Boiling Point and Concentration in Air... 

Gas-Liquid Solutions Gases that are nonpolar, such as N2, or are nearly so, such as NO, have low boiling points because their intermolecular attractions are weak. Likewise, they are not very soluble in water because solute-solvent forces are weak. In fact, as Table 13.3 shows, for nonpolar gases, boiling point generally correlates with solubility in water. 

Agent CAS Registry Number Molecular formula Partition coefficients OH/gas Blood/gas Boiling point, °C Year introduced... 

Properties Colorless, highly flammable gas, boiling point -103.8°C (about -220°F). Reported to have a faint, pleasant odor. 

Properties Colorless, odorless, flammable gas, boiling point. 7°C (23.5°F). Dimerizes thermally and forms explosive peroxides on contact with oxygen. 

Gas Boiling point (°C) Volume of gas produced on evaporation of 1 litre of liquid (litres)... 

Gas Boiling point Liquid density Volume ratio of gas Vapour Critical... 

Diazomethane is a yellow gas, boiling point - 24°. When required for preparative purposes it is used in solution only. In the free state... 

SUBSTANCE TEMPERATURE WHEN IT BECOMES A GAS (BOILING POINT) TEMPERATURE WHEN IT BECOMES A LIQUID (MELTING POINT) OR A SOLID (FREEZING POINT)... 

Another way of showing the same effect is to plot gas sorption against some convenient measure of saturation vapor pressure, such as the gas boiling point... 

Nitrogen is a gas (boiling point -196°C) that occupies approximately 80% of the volume of the air. Thus, it is not surprising that the production of nitrogen from the air is the predominant method of manufacture. 

Ozone (O3) is a light blue gas (boiling point =—110°C). It has a unique electric odor and is highly reactive. Its structure is three oxygen atoms linked together in the... 

Boron trifluoride is a colorless gas (boiling point — 100°C) with a pungent odor. 

Nitric oxide (NO), the simplest nitrogen oxide, is an odd-electron molecule, and therefore it is paramagnetic. A colorless gas (boiling point -152°C), NO can be prepared in the laboratory by reacting sodium nitrite (NaN02) with a reducing agent such as Fe in an acidic medium. 

Dissolving a gas in a liquid is an exothermic process. Assuming an ideal gas, account for this in terms of molecular forces. Suggest a molecular explanation of the Bunsen coefficient a increase with increasing gas boiling point. 

Gas Boiling Point °F Critical Temp °F Critical Press ... 

On a veiy cold day, propane and butane would be liquids (boiling points -44.5°C and -0.5°C, respectively) only methane would still be a gas (boiling point -161.6°C). 

Nitrous oxide (NjO) is a colourless gas (boiling point -88.5 °C) with a slightly sweet taste and odour at high concentration. 

You would not have been able to predict that critical temperature and pressure were appropriate for scaling the nonideal behavior of a gas. Until experiments were performed (and you had completed a course in molecular thermodynamics), any other distinguishing features of a gas - boiling point at 1 atm, the triple point, molar volume, etc. - were reasonable choices. And how can we know that the list of parameters in Table 5.12b is sufficient Again, we would not know until we measured and analyzed data for many gases. If all the data lie on the same plot, the list is sufficient. 

Gas Boiling Point, °C Latent heat of vaporization at normal boiling point and 1 atm, calories/g mole Reference... 

The heat input to diyers is to a gas and as such takes place over a range of temperatures. Moreover, the gas is heated to a temperature higher than the boiling point of the liquid to be evaporated. The exhaust gases from the dryer will be at a lower temperature than the inlet, but again, the heat available in the exhaust will be available over a range of temperatures. The thermal characteristics of dryers tend to be design-specific and quite difierent in nature from both distillation and evaporation. 

The procedure applies to stabilized, i.e., debutanized, crudes, but can be applied to any petroleum mixture with the exception of liquefied petroleum gas, very light naphtha, and those fractions having boiling points over 400°C. 

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