Combined Gas Laws
Ideal Gas Laws
Random Gas Laws
Butane Lab
KMT
100
If I start with 30 mL at 200 K and heat it to 400 K, what would be the new volume. (Pressure is constant)
60 mL
100
What is the value for R, and what are its units?
0.0821 L*atm/mol*K
100
What are the STP values for each unit of pressure (all 4 of them)?
1 atm = 101.3 kPa = 760 mmHg = 760 torr
100
What is the purpose of the lab?
To calculate the molar mass of butane using the experimental data.
100
Which types of gases are closest to ideal, and under which conditions do the behave closest to ideal?
Monatomic and diatomic gases under low pressure and high temperature.
200
If I start with 0.9 atm at 10 Celsius and cool it to 3 Celsius, what would be the new pressure. (Volume is constant)
0.88 atm
200
If I have 3.7 moles of gas at 5 L and 210 K, what would the Pressure be?
12.8 atm
200
A mixture of gases with a pressure of 600.0 mmHg contains nitrogen with a partial pressure of 420 mmHg and oxygen. What is the partial pressure of oxygen in this mixture?
180 mmHg
200
Why do we need the temperature of the water? (What will it be used to determine?)
The vapor pressure of water.
200
What does the kinetic energy of gas particles depend upon?
Temperature
300
If an aerosol can is heated up, and the volume remains constant because the container is rigid, which quantity must change?
Pressure
300
If I have 22 L of gas at 3.3 atm and 280 K, how many moles do I have?
3.16 moles
300
If you have collected an unknown gas in an inverted graduated cylinder via the water displacement method at a barometric pressure of 752 mmHg, and the water temperature is 18.5 C, what is the partial pressure of the unknown gas? (P H2O at 18.5 C is 16 mmHg)
736 mmHg
300
Here is sample data:
Which piece of data is missing?
Air Temperature
300
What's the difference between Diffusion and Effusion
Effusion is the same as diffusion except the particles pass through a tiny opening.
400
Daily Double
- Name the individual gas law (the answer is NOT 'combined gas law') that this video illustrates.
Charles' Law
400
If I have 0.7 moles of gas at 1.3 atm and 43 L, what would the T be?
973 K
400
How many liters are in 50 grams of Cl2 at STP?
15.8 L
400
This food commonly used in spreads among other things has the most fat content of any other fruit/vegetable.
Avacados
400
Specifically in regards to the properties of gases, name at least one property that differentiates a gas from a liquid.
Expansion, compressibility, low density
500
(Intro Hint: When solving a Combined Gas Law Problem, what is the ONLY variable that must have its units converted?)
If I start with 44 mL at 10 Celsius and 152 mmHg, and heat it to 41 Celsius while increasing the pressure to 2432 mmHg, what would be the new volume.
3.05 mL
500
If you have 2 moles of gas, and it occupies 44.8 L, what must the temperature and pressure be? (temp must be in K, press must be in atm)
0 C and 1 atm
500
Of the 3 laws, which 2 have a direct relationship (one goes up, so does the other) and which has an indirect relationship (one increases while the other decreases)?
Charles and Gay-Lussac = direct
Boyles = indirect
Boyles = indirect
500
What's the formula for butane?
C4H10
500
Which 2 assumptions (write out, not just the number) from the KMT never happen, and only apply to ideal gases?
All collisions are elastic.
There is no attraction between particles.