Suppose a gas-filled incandescent light bulb is manufactured

Last updated: 7/5/2022

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°C. a) Find the pressure inside such a bulb when it is hot, assuming its average temperature is 60°C (an approximation) and neglecting any change in volume due to thermal expansion or gas leaks. What is the % increase in the pressure? (b) The actual final pressure for the light bulb will be less than calculated in part (a) because the glass bulb will expand. What will the actual final pressure be, taking this into account? What is the % increase in the pressure? Is this a negligible difference?