Volume of the bubble

[agadag]

1. The problem statement, all variables and given/known data

A bubble with a volume of 1.00 cm3 forms at the bottom of a lake that is 40 m deep. The temperature at the bottom of the lake is 10°C. The bubble rises to the surface where the water temperature is 31°C. Assume that the bubble is small enough that its temperature always matches that of its surroundings. What is the volume of the bubble just before it breaks the surface of the water? Ignore surface tension. Answer in cm3

2. Relevant equations

i wasn't sure how to go about solving this equation at all.
I know that : Change in V = k *V *change in Temp

PLEASE HELP!

[denverdoc]

At least you can ignore surface tension. The combined gas law is your best bet as temp and pressure are both changing. Recall that 1atm of pressure is equal to 10m of water. Be careful to include the regular barometric pressure at both the bottom and the surface.