Passing Gases: Effusion, Diffusion and the Velocity of a Gas

What gas is produced by eggs when they start to go bad?

• ammonia

• fuming hydrochloric acid

• methane

• hydrogen sulfide

Hydrogen sulfide smells like ___

• hydrogen

• sulfur

• lilacs

• ammonia

Dividing the distance that an object traveled by the time it took to do it, and including the direction, is called the ___

• displacement

• speed

• velocity

• acceleration

The velocity of gases is hard to describe because they move in more than one direction at a time and ___

• they're invisible

• the shape and volume of a gas cloud can change

• they are too smelly for the lab

• they move too fast

How fast a sample of gas (a collection of particles) moves from one place to another is called ___

• the net velocity

• the temperature

• the average velocity

• the mean kinetic energy

The statistical mean of the speeds of all the individual atoms or molecules in the system is called ___

• the net velocity

• the temperature

• the average velocity

• the mean kinetic energy

The overall motion of the gas is hindered by collisions among the individual particles, so ___

• the net velocity will always be lower than the average velocity

• the net velocity will always be higher than the average velocity

• the net velocity will always be equal to the average velocity

• the net velocity will always be zero

Gases are like a group of kids in a hallway, the group's overall speed is ___

• lower than the speed of any individual kid

• higher than the speed of any individual kid

• the same as the average kid

• zero

What property of matter is proportional to the average kinetic energy of the particles in a system?

• heat

• temperature

• density

• net velocity

A burn from a stove, that tears apart your cells and tissues, results from a transfer of ___

• chemical potential energy

• kinetic energy

• nuclear energy

• gravitational potential energy