ET unit 7 -- Dalton's Law

What units will be found in the variables of a Dalton's law problem?

• kilopascals (kPa)

• liters (L)

• Kelvins (K)

• moles (mol)

Dalton's law equation is used to find what?

• the density of a pure gas

• the total pressure of a pure gas

• the total pressure of a gas mixture

• the volume of a gas mixture

What is the total pressure of the heliox gas in the diagram?

• 300 kPa

• 100 kPa

• 400 kPa

• 500 kPa

Which of the following is a symbol representing the partial pressure of a gas in Dalton's law equation?

• 
• 
• 
• 

In a mixture of gases, each gas contributes to the total pressure. The individual contribution of each gas is known as the _________________.

• partial volume

• partial pressure

• molar mass

• mole ratio

What variables must be kept constant in Dalton's law?

• the number of moles

• liters and volume

• temperature and volume

• temperature only

Why do mountain climbers carry containers of oxygen?

• the pressure of oxygen is 1/3 the pressure at sea level

• the pressure of of oxygen increases on Mt. Everest

• because Dalton's law says they have to, or else pay a heavy fine when they reach the top of the mountain

A tank of gas contains 50 kPa of helium, 50 kPa of argon, and 100 kPa of neon. What is the total pressure of the gas mixture?

• 100 kPa

• 50 kPa

• 200 L

• 200 kPa

In dry air, what is P_N ?

• 79.11 kPa

• 78.08 %

• 101.32 kPa

• 100.00 %

What does gas pressure depend on?

• size of the container and type of gas

• number of particles and average kinetic energy

• size of container and average mass

• the type of gas in the container