AP Chem Partial Pressures

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?

• 2 atm
• 4 atm
• 3 atm
• 9 atm

• Helium
• Nitrogen 
• Oxygen
• All have the same number of molecules

A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 mmHg and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?

• 234 mmHg
• 1.37 mmHg
• 2.64 mmHg
• 1, 494 mmHg

Real gases deviate from ideal gas behavior because real gas particles have

• volume and some attraction for each other
• no volume and no attraction for each other
• no volume but some attraction for each other
• volume but no attraction for each other

Under what conditions does a real gas behave most like an ideal gas?

• at high temperatures and low pressure
• at high temperatures and high pressures
• at low temperatures and low pressure
• at low temperatures and high pressure

Which curve would show atoms at the highest temperature?

• Purple

• Teal

• Yellow

• Blue

If the four curves represent He atoms (mass 4), Ne atoms (10), Ar atoms (40) and Kr atoms (84) at the same temperature, which color would represent Ar?

• Purple

• Teal

• Yellow

• Blue

Strongest IMF's: Iodine

Weakest IMF's: Carbon Dioxide

A mixture of gases contains Water Vapor, Carbon Dioxide, and Iodine Vapor. As the mixture cools, the substances turn to liquid. What is the order from first to last that the liquids condense?

• Carbon Dioxide, then Iodine, then Water

• Carbon Dioxide, then Water, then Iodine

• Iodine, then Carbon Dioxide, then Water

• Iodine, the Water, then Carbon Dioxide

The volume of a gas is cut in half and the temperature is tripled. What is the pressure in terms of the initial pressure?

• 6 P1

• 2/3 P1

• 3/2 P1

• 1/6 P1

1L flasks at standard temp contain either H2 (2 g/mol), He (4 g/mol), or Ne (10 g/mol) gas. Which container is the densest?

4 atm H2

2 atm He

4 atm He

1 atm Ne

• 4 atm H2

• 2 atm He

• 4 atm He

• 1 atm Ne