Gas Behavior and Properties

What causes the smell of rotten eggs to spread through the air?

• Convection currents

• Diffusion of gas molecules

• Evaporation of liquid

• Chemical reaction

Why is it harder to describe how fast a gas moves compared to how fast a car moves?

• Gas particles are too small to see.

• Gas particles move in many different directions at once.

• Cars are much bigger than gas particles.

• Gas particles do not have a fixed shape.

What does temperature actually measure in a system?

• How hot or cold something feels.

• The average kinetic energy of the particles.

• The amount of heat in the system.

• The speed of the fastest particles.

If two gas particles have the same kinetic energy, which one will move faster?

• The heavier particle.

• The lighter particle.

• Both will move at the same speed.

• It depends on the temperature.

What does Graham's Law of Effusion tell us about how gases move?

• Lighter gases move slower than heavier gases.

• Heavier gases move faster than lighter gases.

• Lighter gases move faster than heavier gases.

• All gases move at the same speed.

What is the process called when a substance spreads out from a high concentration area to a low concentration area until it is evenly distributed?

• Effusion

• Diffusion

• Concentration gradient

• Precipitation

When gases spread out through diffusion, how do their particles move?

• They move together in a planned direction.

• They move randomly and bump into each other.

• They follow a specific path to find empty space.

• They only move when pushed by other particles.

In the experiment where ammonia (NH3) and hydrochloric acid (HCl) gases were released into a tube, which gas traveled faster?

• Hydrochloric acid (HCl) because it is heavier.

• Ammonia (NH3) because it is lighter.

• Both gases traveled at the same speed.

• Neither gas moved because they reacted right away.