A sample of helium gas at 27.0 °C and 3.60 atm pressure is cooled in the same container to a temperature of -73.0 °C. What is the new pressure?

Question

Quizplus · Accepted Answer

Using the ideal gas law and assuming constant volume, the pressure is directly proportional to temperature in Kelvin. Convert temperatures to Kelvin (27°C = 300K, -73°C = 200K) and use P1/T1 = P2/T2 to find the new pressure: (3.60 atm / 300K) = (P2 / 200K), solving gives P2 = 2.40 atm.

A Sample of Helium Gas at 27