Chapter 12, Problem 31P

To determine

The number of moles of air which should be exhaled by a scuba diver while moving to the surface, where the pressure is $1.0\times {10}^5{\text{ N/m}}^{\text{2}}$, from $20\text{ m}$ under the water surface, such that the pressure in the diver’s lungs is $3.0\times {10}^5{\text{ N/m}}^{\text{2}}$ and the air occupies a volume of $4.8\text{ L}$.