s over solvent pressure has ative aspect of solubility of a
Last updated: 7/3/2023
s over solvent pressure has ative aspect of solubility of a gas with pressure has been ble effect on the solutions of solids and liquids The terms of Henry s Law y s Law Sunt of gas dissolved w per unit volume of solvent is proportional to its pressure PA i e XA A or XA KHPA where units of k is bar or atm e above result is sometimes also written as PA or PA KH XA XA Slope k atm gas ts pressure har inits of k is atm or bar pressure of the gas over the solution onality constant known as Henry s law constant w constant is different for each gas solvent dissolved per unit mass of solvent e of Cas K i Temp Ku k bar Application of Henry s Law a In the production of carbonated beverages Why cold drink water bottles are sealed under high pressure According to Henry s law solubility of gas increases with increase in pressure of the solution that is why cold drink bottles are sealed under high pressure so that more CO can be dissolved in it b In the deep sea diving For those people who do deep sea diving nitrogen and oxygen get dissolved in their blood under the effect of pressure of water This dissolved oxygen gets utilized in the metabolic activities but nitrogen remains as such When a person comes out of the sea this nitrogen which was dissolved in blood comes out in the form of bubbles which is very painful This is called de compression sickness c Combination of hemoglobin and oxygen in lungs Lungs oxygen Hb Oxy Hb Tissues Partial pressure is low When air enters lungs partial pressure of the oxygen is high This oxygen combines with hemoglobin to form oxyhemo globin but the tissues has less partial pressure of oxygen Thus in tissues oxyhaemoglobin breaks into oxygen and this released oxygen is used in metabolic activities ILLUSTRATION 8 7 If N gas is bubbled through water at 293 K how many millimoles of N gas would dissolve in 1 liter of water Assume that N exerts a partial pressure of 0 987 bar Given that Henry s law constant for N at 293 K is 76 84 kbar Solution The solubility of gas is related to its mole fraction in the aqueous solution The mole fraction of the in the solution gas uloted by applying Henry s law Thus