1. The problem statement, all variables and given/known data Suppose a gas-filled incandescent light bulb is manufactured so that the gas inside the bulb is at atmospheric pressure when the bulb has a temperature of 20.0 °C. Find the gauge pressure inside such a bulb when it is hot, assuming its average hot temperature is 65.0 °C. 2. Relevant equations (p/t)=(p'/t') where the left hand side is initial pressure and temperature, the right is the when hot. t= 293.15 K t'=338.15 K the gas inside is at atmospheric pressure. 3. The attempt at a solution 1atm= 1.013x^5 Pa i use the formula above, and solve for p' p' = (pt')/t p'=(1.013x10^5)(338.15)/(293.15) (Pa*K)/(K) (the right stuff are the units of measurement used) 116850.0597 Pa. However, I am not getting the answer. I never took a chemistry class, so I am unsure what the difference between gauge pressure/ atmospheric/ absolute pressure is and how to convert it. I believe my formula is correct but I am not using the correct pressure values.