Bunsen solubility coefficient

Pa is called the Bunsen solubility coefficient. It is the volume of gas (in mL) that will dissolve in 1 L of seawater when equilibrium has been reached at STP where... 

The effect of temperature on the Bunsen solubility coefficients of the monoatomic atmospheric gases for seawater of 35%o. Molecular weights are shown in parentheses. 

How can this be No additional gas was added to the water. The answer lies in the nonlinear temperature effect on the Bunsen solubility coefficient (Figure 6.1). Because of the concave nature of the curves relating the Bunsen solubility coefficient to temperature, the result of this type of postequilibration temperature change is always supersaturation. 

Bunsen solubility coefficient (a ) The term that relates the concentration of a gas in seawater to its partial pressure in the atmosphere. It is dependent on temperature and salinity. 

The volume in milliliters of gas dissolved per milliliter of liquid at one atmosphere of partial pressure of the gas at any given temperature. Thus, the Ostwald coefficient (A) differs from the Bunsen solubility coefficient (a) which is based on standard temperature and pressure. The two coefficients are related by the equation A = a(l + 0.00367t) where t is the temperature in degrees Celsius. 

If an absorber is to be designed for efficient and economical service, the solvent chosen must have a special affinity for the one or more components of the gas mixture that are to be selectively removed. In other words, a degree of solubility is needed. Solubility data, which relate the solute, the solvent, the concentrations, and the temperature-pressure conditions, may be found in various compendia and journal articles. In the past, it was common to report solubility as a Bunsen solubility coefficient ... 

Max concentrations of a component i in natural water satiuated by it is called effective solubility. It should not be confused with Bunsen solubility coefficient, which is also max concentration of the component i, but in pure... 

The value of the Sechenow coefficient, as well as the solubility and Bunsen coefficients, depends on temperature. This is why attempts were undertaken to express the correlation of Bunsen solubility coefficient vs. temperature and salinity by one common equation. For instance, Ray Weiss (1970) gathered published data on solubility, put them into one dimension and using the least square technique came up with empiric exponential series of the correlation between Bunsen solubility coefficient (mole-k bar"0 vs. temperature and water salinity ... 

Partial pressure of a gas component in water under the same conditions may be determined using Henry or Bunsen solubility coefficients identified for partial pressures of 1 bar. If the value of Henry solubility coefficient is available, partial pressure of a component i is calculated from equation (2.280). Values of Henry solubility coefficients may be found in reference literature (Table 2.27). However, these values are applicable only... 

Much more often used is Bunsen solubility coefficient. Then partial pressure is determined from equation... 

Bunsen solubility coefficients for distilled water under normal or standard conditions are often called simply solubility. Their values for most common gas components are listed in Table 2.28. 

It is required to find partial pressure of gas components using Bunsen solubility coefficient. 

Table 2.30 Ray Weiss equations constants (2.291) for the determination of Bunsen solubility coefficient, ml-1 atm... 

Contents of the gas components is determined as the product of volume fraction of each of them and the value of the gas/water ration (line 2). Bunsen solubility coefficients (hne 3) and Sechenov coefficients (line 4) for temperature 40 °C may be taken from Tables 2.28 and 2.29. Corrections of Bunsen solubihty coefficients for the salinity (m =118/58 =2.03 mole-1" 0 are calculated from equation (2.306) (line 5). Partial pressure of each component is equal to the ratio of its concentration and the value of corrected Bunsen solubility coefficient (hne 6). 

Partial pressure of any nonpolar component in water, same as gas component, is not difficult to determine if the values of its Henry or Bunsen solubility coefficients are known. For this should be used equations (2.281) and (2.284) in consideration of the correction for water salinity by equation (2.290). More often in this case the Henry coefficient is used. 

Oil product has average molecular weight = 226 g-mole and the density p =0.810 g-cm Benzene molecular weight = 78.12, density Pbenz g-cm saturated vapour pressure Pbenz = 76 mm Hg, Bunsen solubility coefficient Bo,benz= 1.82-10 mole-F -bar f... 

This is justified by the relatively high methane coneentrations in the gas emitted from landfill sites, and low methane solubihty in water (Bunsen solubility coefficient = 0.0331 dm dm Glinski St pniewski, 1985). 

The solubilities of gases in liquids may be expressed in various ways. In the definition of the Bunsen coefficient the solubility is expressed as the volume of the ideal gas reduced to O C and 1 atm pressure soluble in a unit volume of liquid under the gas pressure of 1 atm and at the temperature of measurement. The Ostwald solubility ki — Vgl V oiy is defined as the ratio of the volume of absorbed gas to the volume of the absorbing liquid, measured at the same temperature. The Bunsen solubility coefficient a and the Ostwald coefficient L on the assumption of ideal gas behavior are related to the simple g-moles/liter concentration scale c by the relationships which are applicable when P = 1 atm ... 

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