Question

1/ The stopcock connecting a 3.15 L bulb containing carbon dioxide gas at a pressure of 9.69 atm, and a 4.15 L bulb containing xenon gas at a pressure of 2.59 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is .... atm.

2/ A mixture of xenon and hydrogen gases, at a total pressure of 647 mm Hg, contains 10.3 grams ofxenon and 0.403 grams of hydrogen. What is the partial pressure of each gas in the mixture?

P_Xe = (.......) mm Hg
P_H2 = (.......) mm Hg

3/ A mixture of nitrogen and neon gases contains nitrogen at a partial pressure of 437 mm Hg and neon at a partial pressure of 429 mm Hg. What is the mole fraction of each gas in the mixture?

X_N2 = .....
X_Ne = .....

4/ A mixture of carbon dioxide and xenon gases at a total pressure of 973 mm Hg contains carbon dioxideat a partial pressure of 426 mm Hg. If the gas mixture contains 7.58 grams of carbon dioxide, how many grams of xenonare present?

= (......) g Xe

Answer 1

1)

The stopcock connecting a 3.15 L bulb containing carbon dioxide gas at a pressure of 9.69 atm, and a 4.15 L bulb containing xenon gas at a pressure of 2.59 atm, is opened and the gases are allowed to mix. Assuming that the temperature remains constant, the final pressure in the system is .... atm.

pressure of CO2 P1 = 9.69 atm

P2 = ??

volume v1 = 3.15 L

V2 = 3.15 + 4.15 = 7.3 L

P1 V1 = P2 V2

9.69 x 3.15 = P2 x 7.3

P2 = 4.18

pressure of CO2 = 4.18 atm

Pressure of xenon = 2.59 atm

volume = 4.15 L , V2 = 7.3 L

2.59 x 4.15 = P2 x 7.3

P2 = 1.47 atm

final pressure in the system = 5.65 atm