Bunsen absorption coefficient

In this study, the solubilities of carbon dioxide were represented by the Bunsen absorption coefficients and their values given in Table I for lithium chloride and in Table II for calcium chloride. The densities of salt solutions are... 

A solution of a gas in a liquid is dependent on the pressure and temperature as well as on the nature of the solvent and the gas. For a given pressure and temperature, the amount of gas dissolved in a given solvent increases with the ease of liquefaction of the gas. If a chemical reaction occurs during the dissolution of the gas in the liquid solvent, the solubility of the gas increases. The solubility of gas is frequently expressed by the Bunsen absorption coefficient, defined as the volume of gas reduced at 0°C and at 1 atm, that is dissolved in a given volume of liquid at a given temperature under a partial pressure of 1 atm for the gas. 

The Bunsen absorption coefficient of carbon dioxide in water at 20°C is 0.88. Calculate the solubility of carbon dioxide in water at 20°C and a partial pressure of carbon dioxide of 0.54 atm. 

Bunsen Absorption Coefficient, /3, in that the volume (v) of the dissolved gas is not reduced to 0° and 760 mm. The solubility I is therefore the volume of gas dissolved by unit volume of the solvent at the temperature of the experiment. The two expressions are related thus ... 

The solubility of gases is often expressed as the Bunsen absorption coefficient, a, which is the volume of gas, measured at 0 °C and 1 atm, dissolved by unit volume of solvent if the partial pressure of the gas is 1 atm. 

The Bunsen absorption coefficients of oxygen and nitrogen in water are 0.0283 and 0.0143, respectively, at 25 °C. Suppose that air is 20 % oxygen and 80 % nitrogen. How many cubic centimetres of gas, measured at STP, will be dissolved by 100 cm of water in equilibrium with air at 1 atm pressure How many will be dissolved if the pressure is 10 atm What is the mole ratio, N2/O2, of the dissolved gas ... 

Suppose that a 250-cm bottle of carbonated water at 25 °C contains CO2 under 2 atm pressure. If the Bunsen absorption coefficient of CO2 is 0.76, what is the total volume of CO2, measured at STP, that is dissolved in the water ... 

Fig. 2.94 Solubility of CO2 in water (at 1 atm CO2) in terms of the dimensionless Bunsen absorption coefficient a in dependence from temperature (in volume dissolved CO2 / volume of solution) data from Gmelin (1943).

The temperature dependency is described by the van t Hoff equation (4.94) where the reaction enthalpy must be replaced by the enthalpy of solution A oiH. The derivation of (4.209) follows from the equality of the chemical potentials in the gas and aqueous phases in equilibrium, q ig) + RTlnPa = q (aq) + i Tln [A] from which [A] = Pa constant follows. In close relation to the Henry s law constant are the Bunsen absorption coefficient a (the volume of gas absorbed by one volume... 

Fig. 5.3-3 Values of Bunsen absorption coefficient a of selected compounds vs. temperature taken from Landolt-Bomstein (1980)...

As well as Henry s constant // , a measure of the capacity of a liquid to dissolve a gas, are the Bunsen absorption coefficient Obu, and the Oswald absorption coefficient Oqsj, which can be found in tables. The Bunsen absorption coefficient is... 

At a partial pressure p of 1.013 bar of gas i, the Bunsen absorption coefficient Kbu, is the volume at standard state that is dissolved in one unit of solute at a given temperature. 

Because the equilibrium constant of the above reaction at a given gas pressure is equal to the Bunsen absorption coefficient a of the gas, it is possible to express the temperature dependence of the solubility of the gas using the Van t Hoff equation as follows ... 

Note that Henry s constant is expressed in various other units, for example, in conjunction with kinetic equations for gas-liquid systems (Section 4.4). If the gas phase concentration is denoted in pressure units (Pa) and the liquid phase concentration in molarity (mol m ), a different unit for Henry s constant is obtained (Ha,c = Pa/ca, Pam mol ). If both the liquid and the gas phase concentrations are expressed as molar fractions, a dimensionless value is obtained for Henry s constant. Therefore, be careful in noting the correct units obtained from the literature. In addition, note that in older literature an absorption coefficient is frequently used, for example, the Bunsen absorption coefficient bu (in ni m bar ) defined as the volume of gas (at 1.013 bar and 0°C) absorbed by one volume of liquid at a certain pressure, for example, 1 bar. Thus bu is inversely proportional to and equivalent to the term /Omoi,iiq 0.0224 m morVWx-... 

Lannung (1930) gave solubility results for He, Ne, and Ar in water, methanol, ethanol, acetone, benzene, cyclohexane, and cyclohexanol for different temperatures from 5 to 45 C. He gave his results as the Bunsen absorption coefficient a. He gave the Ostwald coefficient L, where L = aT/273 and T is the r K of the measurement, but he defined L as the equilibrium ratio of the volume concentrations of the gas in the solution and in the vapor phase. ... 

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