Law of PP, Effusion, and Real vs Ideal Gases

A container holds three gases: oxygen, carbon dioxide, and helium. The partial pressures of the three gases are 2.00 atm, 3.00 atm, and 4.00 atm, respectively. What is the total pressure inside the container?

• 900 atm

• 0.90 atm

• 9.00 atm

• 920 atm

Suppose you have two gases numbered 1 and 2.

Which equation represents make the most sense to calculate the total pressure exerted by both gases?

• Multiply their pressures :

  P_total = P₁ × P₂

• Divide their pressures :

  P_total = P₁ ÷ P₂

• Add their pressures :

  P_total = P₁ + P₂

• Subtract their pressures :

  P_total = P₁ – P₂

• Average their pressure :

  P_total = (P₁ + P₂)/2

A container holds a mixture of two different gases. The oxygen in a container exerts 80 mmHg of pressure on the inside of the container. The total pressure inside the container is 120 mmHg. What is the pressure of the other gas in the container?

• 200 mmHg

• 80 mmHg

• 40 mmHg

• 120 mmHg

Under which conditions of temperature and pressure does carbon dioxide behave most like an ideal gas?

• A) Low temperature and low pressure

• B) Low temperature and high pressure

• C) High temperature and low pressure

• D) High temperature and high pressure

One reason that a real gas deviates from an ideal gas is that the molecules of a real gas have

• A) a straight-line motion

• B) no net loss of energy on collision

• C) a negligible volume

• D) forces of attraction for each other

Which statement describes the particles of an ideal gas based on the kinetic molecular theory?

• A) The gas particles are relatively far apart and have negligible volume.

• B) The gas particles are in constant, nonlinear motion.

• C) The gas particles have attractive forces between them.

• D) The gas particles have collisions without transferring energy.

The concept of an ideal gas is used to explain

• A) the mass of a gas sample

• B) the behavior of a gas sample

• C) why some gases are monatomic

• D) why some gases are diatomic

Lighter gases have a ________________ rate of effusion.

• faster 
• slower
• rate of effusion does not depend on mass.

The rate of effusion is _______________ proportional to the square root of its' molar mass. 

• Directly
• Inversely 

Effusion is

• used to describe the combustibility of a gas.
• ability of a gas to escape through a tiny opening
• what occurs after diffusion.
• the ability of a gas to mix with other gases.