Question

Incandescent lightbulbs are filled with an inert gas to lengthen the filament life. With the current off (at T = 20.0°C), the gas inside a lightbulb has a pressure of 126 kPa. When the bulb is burning, the temperature rises to 83.7°C. What is the pressure at the higher temperature?

Answer 1

$p_2=p_1\frac{T_2}{T_1}=153~kPa.$