For the calculation of the solubility c of a gas in a solvent, it is often convenient to use the expression c=Kp, where K is the Henry's law constant.
Breathing air at high pressures, such as in scuba diving,
results in an increased concentration of dissolved nitrogen. The Henry's law constant for the solubility of nitrogen is 0.18 /lg/(g H20 atm). What mass of nitrogen is dissolved in 100 g of water saturated with air at 4.0 atm and 20°C? Compare your answer to that for 100 g of water saturated with air at 1.0 atm. (Air is 78.08 mole per cent N2.) If nitrogen is four times as soluble in fatty tissues as in water, what is the increase in nitrogen concentration in fatty tissue in going from 1 atm to 4 atm?