Gas Laws
Practice Problems
Whiteboarding
Draw a picture of molecules in the
form of solid liquid and gas.
Solid
Liquid
Gas
Draw a picture of molecules in the
form of solid liquid and gas.
What are the three characteristics of gas
laws?
What are the three characteristics of gas
laws?
Temperature
Pressure
Volume
Looking at the data below, what is
the relationship between Volume
and Temperature?
Can you think of an example?
Looking at the data below, what is
the relationship between Volume
and Temperature?
Direct Relationship!
As temperature increases, volume increases
Example - balloon in erlenmeyer flask
Looking at the data below, what is
the relationship between
Temperature and Pressure?
Can you think of an example?
Looking at the data below, what is
the relationship between
Temperature and Pressure?
Direct Relationship!
As temperature increases, pressure increases
Example - can crush!
Describe the relationship between
pressure and volume using the
picture below.
Describe the relationship between
pressure and volume using the
picture below.
As volume INCREASES,
pressure DECREASES
Inverse relationship
After looking at the relationships of
these characteristics, draw in what
each graph will look like.
After looking at the relationships of
these characteristics, draw in what
each graph will look like.
Direct
Inverse
Direct
What is Kelvin a measure of? Why is
it so important?
What is Kelvin a measure of?
Temperature
It is important because it allows us to use very low
temperatures without getting a negative number
How to convert
273 + temperature in celsius
Ways to help solve!
● Write out all that you are GIVEN in the
problem
● Figure out which 2 of the 3 chacteristics you
are dealing with in the problem
● Find the correct formula that contains them
Boyle’s Law!
Lab #52!
Volume and Pressure
A sample of a gas has a volume of 150 mL when
its pressure is 0.947 atm. What will the volume
of the gas be at a pressure of 0.987 atm, if the
temperature remains constant?
A sample of a gas has a volume of 150 mL when
its pressure is 0.947 atm. What will the volume
of the gas be at a pressure of 0.987 atm, if the
temperature remains constant?
You decide to climb to the top of the tallest mountain, Mt. Everest.
Before you are about to leave on your epic journey a friend gives you a
balloon that was inflated to 800mL at sea level, where the pressure is 760
mmHg. You climb up to the top of Mt. Everest, 29,028ft above sea level,
which has an average atmospheric pressure of 221 mmHg. What is the
volume of the balloon at the top of Mt. Everest?
You decide to climb to the top of the tallest mountain, Mt. Everest.
Before you are about to leave on your epic journey a friend gives you a
balloon that was inflated to 800mL at sea level, where the pressure is 760
mmHg. You climb up to the top of Mt. Everest, 29,028ft above sea level,
which has an average atmospheric pressure of 221 mmHg. What is the
volume of the balloon at the top of Mt. Everest?
Charles’s Law!
Temperature and Volume
A sample of a gas occupies a volume of 752
mL at 298.15K. What volume will the gas
occupy if the temperature increases to
323.15K, if the pressure remains constant?
A sample of a gas occupies a volume of 752
mL at 298.15K. What volume will the gas
occupy if the temperature increases to
323.15K, if the pressure remains constant?
Cross
multiply!
If you inflate a balloon to a size of 8.0 L inside where
the temperature is 296.15K, what will be the new size of
the balloon when you go outside where it is 276.15K?
If you inflate a balloon to a size of 8.0 L inside where
the temperature is 296.15K, what will be the new size of
the balloon when you go outside where it is 276.15K?
Gay Lussac’s Law
Temperature and Pressure
A sample of a gas has a pressure of 3.00 atm at
298.15K. What would the gas pressure be at 325.15°C, if
the volume remains constant?
Cross
multiply!
A sample of a gas has a pressure of 3.00 atm at
298.15K. What would the gas pressure be at 325.15K, if
the volume remains constant?
A bicycle tire is filled with air to a pressure of
100. psi at a temperature of 272.15K. Riding the
bike on asphalt on a hot day
increases the temperature of the tire to 331.15K.
What is the tire pressure if the tire does not
stretch?
A bicycle tire is filled with air to a pressure of
100. psi at a temperature of 272.15K. Riding the
bike on asphalt on a hot day
increases the temperature of the tire to 331.15K.
What is the tire pressure if the tire does not
stretch?
Ideal Gas Law
At what temperature would 2.10 moles of N2 gas have a
pressure of 1.25 atm in a 25.0 L tank?
At what temperature would 2.10 moles of N2 gas have a
pressure of 1.25 atm in a 25.0 L tank?
What would the pressure be inside of a 65.0 liter tank
containing 1250 grams of Helium at 308.15K?
(Hint: convert g of He to moles of He)
What would the pressure be inside of a 65.0 liter tank
containing 1250 grams of Helium at 308.15K?
(Hint: convert g of He to moles of He)