12.1 Gases

What pressure does a 4000 N (408 Kg or 900 pound) horse exert on the ground if each foot is 10 cm²?

• 40 N/cm²

• 100 N/cm²

• 400 N/cm²

• 10 N/cm²

Which of the following statements is true?

• particles of a gas never collide
• particles of a gas collide with their container only.
• particles of a gas collide with each other in elastic collisions.
• particles of a gas collide with each other in inelastic collisions.

Which is NOT a value equal to 1 atm of pressure?

• 760 torr
• 1 psi
• 101.3 kPa
• 760 mmHg

Which is an example of gas diffusion?

• inflating a flat tire
• the odor of perfume spreading throughout a room
• a cylinder of oxygen stored under high pressure
• All of the above

By which property of gases explains why they take the shape of their container?

• evaporation

• expansion

• adhesion

• effusion

Explain what would happen to the column of mercury in the barometer as shown if the atmospheric pressure fell.

• As the pressure falls, the column of mercury will drop lower.
• As the pressure falls, the column of mercury will remain unchanged.
• As the pressure falls, the column of mercury will rise higher.
• As the pressure falls, the density of the mercury will increase.

How can we increase the gas pressure inside a sealed container?

• Increase the number of particles inside the container
• Increase the temperature
• Decrease the volume of the container
• All of these

Which substance has the lowest density?

• H₂O(g)
• H₂O(l)
• Hg(l)
• Al(s)

The theory that describes the behavior of gases in terms of the motion of gas particles is _____________.

• the theory of intermolecular forces
• Graham's law of effusion
• Dalton's law of partial pressures
• the kinetic-molecular theory

Tags

NGSS.HS-PS2-1

Compared to a man standing on a tall mountain, a man standing at sea level 

• has less atmospheric pressure on him 
• has more atmospheric pressure on him 
• weighs less 
• has more mass