For the absorption of a gas (like carbon dioxide) into a liquid (like water) Henry’s law states that partial pressure of the gas is proportional to the mole fraction of the gas in the liquid–gas solution with the constant of proportionality being Henry’s constant. A bottle of soda pop (CO2 - H2O) at room temperature has a Henry’s constant of 17,100 kPa. If the pressure in this bottle is 140 kPa and the partial pressure of the water vapor in the gas volume at the top of the bottle is neglected, the concentration of the CO2 in the liquid H2O is

(a) 0.004 mol-CO2/mol
(b) 0.008 mol-CO2/mol
(c) 0.012 mol-CO2/mol
(d) 0.024 mol-CO2/mol
(e) 0.035 mol-CO2/mol


(b) 0.008 mol-CO2/mol

H=17.1 [MPa]
P=0.140 [MPa]
y=P/H

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