1. The problem statement, all variables and given/known data A diver 38.8 m deep in 14°C fresh water exhales a 2.19 cm diameter bubble. What is the bubble's diameter just as it reaches the surface of the lake, where the water temperature is 25°C? 2. Relevant equations PV=nRT 3. The attempt at a solution I dont know where to start on this problem at all I can find the intial pressure of the bubble but I dont see how that matters?