Look at the apparatus shown below.Inside each chamber there is a sample of a gas at the specified volume and pressure.Once the stopcock is opened,what will be the total pressure inside the system.The whole process is done under constant temperature.

Question

Quizplus · Accepted Answer

According to Dalton's law of partial pressures, the total pressure of a system is equal to the sum of the partial pressures of each gas in the system. Therefore, once the stopcock is opened, the total pressure inside the system will be the sum of the pressures in the two chambers, which is (350 torr + 540 torr) = 890 torr. However, the question asks for the total pressure inside the system after the stopcock is opened. This means that the gases will mix and occupy the same volume, which will result in a new pressure inside the system. Since the temperature is constant, the combined gas law can be used to find the new pressure.

P1V1 = P2V2
(350 torr)(250 mL) + (540 torr)(350 mL) = P2(600 mL)
P2 = (350 torr)(250 mL) + (540 torr)(350 mL) / (600 mL)
P2 = 222,500 torr mL / 600 mL
P2 = 445 torr

Therefore, the total pressure inside the system after the stopcock is opened is 445 torr.

Look at the Apparatus Shown Below