Question

Resources Heliox is a helium-oxygen mixture that may be used in scuba tanks for divers working at great depths. It is also used medically as a breathing treatment. A 5.25 L tank holds helium gas at a pressure of 1657 psi. A sccond 5.25 L tank holds oxygen at a pressure of 440.4 psi. The two gases are mixed in a 5.25 L tank. If the temperature remains the same throughout the process, what is the pressure of the gas mixture in the tank? Assume ideal gas behavior. P= psi

Answer 1

He gas

initial                            final

P1 = 1657pi               P2 =

V1   = 5.25L               V2 = 5.25 L

P1V1   = P2V2

P2   = P1V1/V2

       = 1657*5.25/5.25 = 1657psi

The pressure of helium = 1657psi

O2 gas

initial                            final

P1 = 440.4pi               P2 =

V1   = 5.25L               V2 = 5.25 L

P1V1   = P2V2

P2   = P1V1/V2

       = 440.4*5.25/5.25 = 440.4psi

The pressure of oxygen =440.4psi

The total pressure of gases mixture in the tank = 1657 + 440.4   = 2097.4psi >>>>answer