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## Homework Statement

A balloon is released from the bottom of a deep lake where the temperature is always 4 degC and rises to the top, where the pressure is standard atmospheric pressure. Assume that the balloon rises slowly enough that the temperature of the gas inside adjusts to its surroundings. Determine the pressure at the initial depth and the temperature of the air above the lake.

Diagram is here:

http://iwp2.ncssm.edu/pps/webInterface.php/Users/winters@ncssm.edu/gas-laws-bubble-01b.iwp...

Sorry part of it got cut off

## Homework Equations

P1V1/T1 = P2V2/T2

## The Attempt at a Solution

I can't seem to start this because I am missing two of the values in the Combined Gas Law, so I can't solve for one or the other. Any suggestions? Thanks in advance

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