1. The problem statement, all variables and given/known data[/b An automobile tire having a temperature of .64 degrees C is filled to a gauge pressure of 27 lb ft/in2. What would be the gauge pressure in the tire when its temperature rises to 39 degrees C? 2. Relevant equations Assume the volume remains constant, the air doesn't leak out, and the atmospheric pressure remains constant at 14.7 lb ft/in2 3. The attempt at a solution i'm pretty sure your supposed to use the equation p=pg + po. How do I find the gauge pressure with a temperature increase??