ET 19 and ET 20 Quizizz

Which of the following is an assumption of the kinetic-molecular theory of gases?

• Collisions between gas particles are inelastic.

• Gases consist of closely spaced particles.

• Gas particles move around in an orderly manner.

• The temperature of a gas depends on the average kinetic energy of the gas particles.

The movement of gas molecules is greatly affected by _________.

• the shape of the container
• size of the container
• temperature of the container

The energy of an object as it is in motion is defined as

• Kinetic Theory
• Kinetic energy
• Potential energy
• Electric energy

Gas molecules can easily be compressed  because ___________. 

• gas molecules are soft
• gas molecules are far apart
• gas molecules follow the shape of the container

The kinetic theory states

• Particles won't move if you don't apply energy to it.

• Particles only move in liquids and gases.

• Particles are always in motion.

• At the same temperature the object that has the most mass heats quicker.

If you spray air freshener on side of the room, why is there a delay for the smell to reach the other side of the room? 

• Attractive forces between air and air freshener particles
• Not enough air freshener particles
• Because the particles like where they are at
• Collisions between air and air freshener particles

In which state of matter are the particles moving the least random

• Gas
• Liquid
• Solid
• Plasma

Which is NOT an assumption made by the kinetic molecular theory of gases?

• Gas particles are small and take up little volume
• Particles travel in constant, random, straight-line motion until colliding
• When particles collide, their total kinetic energy is decreased
• Particles do not attract or repel each other

In an ideal gas, if everything else is held constant, doubling the volume will ________ the pressure.

• double

• halve

• not affect

• eliminate

Answer explanation

$PV=nRT$

Since nRT cannot change, neither can PV. If you multiply V by 2, you would have to multiply P by 1/2 to keep the right side constant.

The pressure of a gas at 22 °C goes from 3 atm to 6 atm, with volume held constant. It's new temperature is...

• 44 °C

• 11 °C

• 317 °C

• 0 °C

Answer explanation

The Kelvin temperature doubles.

22 °C = 295 K

295*2 = 590

590 – 273 = 317 °C