Chapter 10, Problem 30QAP

Air contains 78% nitrogen. At 25°C, Henry's law constant for nitrogen is $6.8\times {10}^{-4}\text{M}/\text{atm}$, while at 37°C, it is $6.2\times {10}^{-4}\text{M}/\text{atm}$.

(a) How many milligrams of the nitrogen in the air will dissolve in 3.0 L of water at 25°C? The air in the head space above the water has a pressure of 1.38 atm.

(b) How many milligrams of the nitrogen in the air will dissolve in 3.0 L of water at 37°C? The air in the head space above the water has a pressure of 1.38 atm.

(c) How much more nitrogen is dissolved at the lower temperature in mass percent?