So the pressure of the air equals the pressure of the mercury. If the change in length is 10cm - 2 cm = 8cm, then the mercury would have increased 80 mmHg. Add this to the original 2 mmHg and you get 82 mmHg at 10 degrees Celsius. Am I thinking about this correctly?
The space above the mercury column in a thermometer ordinarily is evacuated, but due to faulty manufacture, a particular thermometer has a pressure of 2 mmHg of air in this space when the whole thermometer is immersed in a bath at 0 degrees Celsius. Calculate the pressure of the air when the...