Lesson - Test 2 - 4th 6wks

Lesson

Gas Laws

Kinetic Molecular Theory

Gas particles travel in straight lines unless they collide with other particles or the walls of the container.

Kinetic Molecular Theory

Gas particles have negligible volume compared to the free space between them.

Kinetic Molecular Theory

• Gas particles experience negligible intermolecular forces, there are no attractive or repulsive forces between particles.

Kinetic Molecular Theory

Molecular collisions are perfectly elastic and kinetic energy is conserved.

Kinetic Molecular Theory

The average kinetic energy of the particles in a sample of gas is proportional to the absolute temperature.

Multiple Choice

What creates air pressure inside the balloon?

• the collisions air makes with the walls of the container

• the collisions air makes with each other

• the balloon is made of latex

• air

Fill in the Blank

Convert 20 degrees Celsius to Kelvin

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Multiple Select

Using the postulates of the kinetic molecular theory, explain why a gas uniformly fills a container of any shape.

• Gases are composed of molecules that are in continuous motion, travelling in straight lines and changing direction only when they collide with other molecules or with the walls of a container.

• The molecules composing the gas are negligibly small compared to the distances between them.

• The pressure exerted by a gas in a container results from collisions between the gas molecules and the container walls.

• The average kinetic energy of the particles in a sample of gas is proportional to the absolute temperature.

Multiple Select

Which of the following is not true about the volume of a gas?

• Most of the volume is empty space.

• The volume is about 10 times greater than that occupied by an equal number of particles in the liquid or solid state.

• The volume is occupied by particles in continuous, rapid, random motion.

• Generally, the volume can be easily changed

Multiple Choice

The more energy that particles have, the ___ they move.

• slower

• faster

Multiple Choice

The pressure exerted by a gas does not depend on

• temperature

• volume

• number of moles present

• the identity of the gas

Multiple Choice

Find the true statement based on the picture

• Flask 1 contain the most molecules

• Flask 2 contain the most molecules

• Flask 3 contain the most molecules

• Flask 4 contain the most molecules

Boyle's Law

Pressure and Volume have an inversely proportional relationship

P₁V₁ = P₂V₂

Multiple Select

Find the correct statement(s) below that identifies with Boyle's Law

• Volume decreases

  Pressure increases

• Volume increases

  Pressure decreases

• Pressure decreases

  Volume increases

• P1 = 12 atm

  P2 = 6 atm

  V1 = 5 L

  V2 = 15 L

Multiple Select

Pick Boyle's Law examples

• How you get air into your lungs

• Putting air into a balloon

• tires look low an a cold day

• hot air balloon coming back down to earth

Multiple Select

Choose ALL that Boyle's Law explains

• breathing

• popping the top off a water bottle after twisting the bottom

• air pump

• blowing up a balloon

Multiple Select

A sample of Cl₂O at 2.71 atm experiences a change in volume from 5754.7 cm³ to 8133.5 cm³.

Find the ingredient for volume

• 2.71 atm

• 5754.7 cm³

• 8133.5 cm³

• Cl₂O

Fill in the Blank

A sample of SO₂ experiences a change in pressure from 2.0 kPa to 6.0 kPa.

If its new volume is 5.0 cm³, what was its original volume in cubic centimeters?

Charles' Law

Volume and Temperature have a DIRECT relationship

Temperature MUST be in KELVIN

Celsius to Kelvin add 273.15

T₁V₂ = T₂V₁

Multiple Choice

What unit does temperature have to be in to solve Charles' Law problems

• Celsius

• Kelvin

• Fahrenheit

Multiple Select

Find the correct relationships for Charles' Law

• volume increases

  temperature increases

• temperature increases

  volume decreases

• temperature goes up

  volume goes up

• pressure goes up

  volume goes up

Multiple Select

Choose ALL that Charles' Law explains

• how we breath

• a hot air balloon going up into the sky

• the volume in your tires decreasing on a freezing cold day

• the lid popping off a container that has been heated in the microwave

Multiple Choice

The temperature of 10L of CH₃Cl is changed from 9.0 K to 10.0 K.

What is the new volume of the gas in cubic centimeters?

• 8 L
• 8.0 L

• 8.00L

• 0.8L

Avogadro's Law

Volume and Moles have a DIRECT relationship

v₁n₂ = V₂n₁

Multiple Select

Click on the examples of Avogadro's Law

• putting air into a flat tire

• a tire going flat

• the egg in the flask

• putting a dented ping pong ball in boiling water

Multiple Choice

It the volume in a balloon is 1.0 L with 4 moles of air in it, what will be the volume when you let 1.0 mole of air out of the balloon?

• 0.75 L

• 0.25 L

• 0.8 L

• 0.3 L

Ideal Gas Law

PV = nRT

R = 0.0821 L atm / mol K

Multiple Select

Julian and Jimmy are playing basketball outside in 82°C weather. If they leave the ball outside and temperature drops down to 53°C, what will happen to the volume of the gas in the ball if the pressure remains constant?

• volume will remain the same

• volume will increase

• volume will decrease

• it will explode and destroy the earth

Multiple Choice

What does R stand for in the Ideal Gas Law?

• Ideal gas constant

• Real gas constant

• Temperature constant

• Ideal gas law

Multiple Choice

Which are the correct units for R = 0.0821?

• L atm / mol K

• n atm / mol K

• L psi / mol C

• L mmHg / K

Fill in the Blank

A mixture of hydrogen, nitrogen, and water vapor has a total pressure of 864 mmHg. The partial pressure of hydrogen is 220 Pa and that of nitrogen is 410 mmHg. What is the partial pressure of water vapor?

Round the final answer to 10 sig figs with unit symbol for answer.

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Multiple Choice

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

Fill in the Blank

What is the partial pressure of nitrogen based on the table?

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