Question

(a) The pressure gauge on a tank registers the gauge pressure, which is the difference between the interior pressure and exterior pressure. When the tank is full of oxygen (O2), it contains 10.0 kg of the gas at a gauge pressure of 37.0 atm. Determine the mass of oxygen that has been withdrawn from the tank when the pressure reading is 21.8 atm. Assume the temperature of the tank remains constant. kg (b) What If? When refilling the tank, you forget that the tank was only partially empty, and fill it with an additional 10.0 kg of oxygen. What is the gauge pressure of the tank after it is refilled? atm

Answer 1

. a). when tank is full of oxygen maloby, P = 37 atm; } readings. P 218 atms. J . from Ideal gas equation (PV=nRT but po absolute pressure I » Plabs = gauge + atmospheric pressure - 37 +1 labs? 38 am Peabs - Pegauge + atm pressure = 21.8.+ 1 = 22.8 Peabs 22.8 atrol from ideal gas eqs Qua MRT (at Tac) Vac § 3822.8- " Mass removed = m_m₂ = 10-6 = 4Kgl.

b). when tank is partially enpty ne m2 = 6 kg O refilled with 10 kg additional. z mos me +10 mg = 16 Kg . Ele Barries a la - Pisaks : 60.8 gauge, atom. . B a gauge pressure reading a Prabs- atm pren 3 Pzt a 60.8-1. . gauge pressus. B 2 59.8 atm. уемох.