Henry's law constant for the solubility of N2 gas in water at 298K is 1.0×105 atm. The mole fraction of N2 in air is 0.6. The number of moles of N2 from air dissolved in 10 moles of water at 298K and 5 atm pressure is
3.0 × 10-4
Partial pressure of N2 in air (PN2)=PTotal×XN2(in air)PN2(in air)=KH×XN2(in H2O)5×0.6=1×105×XN2(in H2O)
XN2 in 10 moles of water =5×0.61×105=3×10−5XN2=nN2nN2+nH2O3×10−5=nN2nN2+10⇒nN2×3×10−5+3×10−5×10=n23×10−4=nN2(1−3×10−5)nN2=3×10−4