The pressure in a constant volume gas thermometer is 0.700 atmosphere at 1,100 degrees Celsius and 0.512 atmosphere at 0 degrees Celsius.

A. What's the temperature when the pressure is 0.400 atmosphere?
B. What's the pressure at 450 degrees Celsius?

A. The temperature when the pressure is 0.400 atmosphere is approximately 645 degrees Celsius.

B. The pressure at 450 degrees Celsius is approximately 0.622 atmosphere.