APPLIED THERMODYNAMICS The mass of a gas dissolved in a given volume of the liquid is directly proportional to the pressure of the gas present in equilibrium with the liquid.
where 'm' is the mass of the gas dissolved in a unit volume of the solvent. p is the pressure of the gas in equilibrium with the solvent. k is the proportionality constant called Henry's law constant characteristic of the nature of the solvent and the natures of the gas, also the temperature. Dalton also concluded independently that, solubility of a gas in liquid solution is a function of the partial pressure of the gas. If mole fraction is used to represent the solubility of the gas in the solution, then
where, p is the partial pressure of the gas in solution, x is the mole fraction of the gas in solution and KH is Henry's law constant. Here are the values of Henry's Law Constant (KH) for some selected gases in water �Gas
�Temp/K
�KH/K bar
�He
�293
�144.97
�H2
�293
�69.16
�N2
�293
�76.48
�N2
�303
�88.84
�O2
�293
�34.86
�O2
�393
�46.82
S.A.Q.6 Define Molarity _____________________________________________________________________________ _____________________________________________________________________________ ______________________________________________________________
FOR MORE DETAILS VISIT US ON WWW.IMTSINSTITUTE.COM OR CALL ON +91-9999554621
72