Riddles for each group:
Group 1: Why does hamburger have lower energy than steak? Answer: It is in the ground state.
Group 2: Why did the white bear dissolve in water? Answer: It is polar
Group 3: Why are chemists great at solving a problem? Answer: They have all the solutions
Group 4: What is a scientist’s favorite kind of tree? Answer: A chemistree
Word
Why
Problems
Helium takes up 5.71 liters at 273K and 3.95 atm. What is the volume of
the same helium at 273K and 1.05 atm?
Answer
21.5 L
Boyle’s
Does
What pressure will develop in a system which begins at 740 mm Hg and
30oC if the temperature changes to 150oC?
1033 mm Hg
Gay-Lusaac
Hamburger
A sample of gas has a volume of 350.0 mL at 27.0°C. The gas is heated at 156 °C
constant pressure until the volume is 500.0 mL. What is the final
Charles’
temperature of the gas in degrees Celsius?
Have
0.250 moles of HCl will occupy how many liters at STP?
Lower
9670 mm Hg
What pressure (in mmHg) must a 0.100 L cylinder hold in order to contain Ideal
0.0500 moles of NH3 at 37oC?
2.00 L of a gas is collected at 298 K and 745.0 mmHg. What is the volume 1.80 L
at STP?
Combined
Energy
Than
Steak
Why
Did
The
White
Bear
5.6 L
Avogadro’s
Gas X has a molar mass of 72 g/mol and Gas Y has a molar mass of
6 times faster
2 g/mol. How much faster or slower does Gas Y effuse from a small
Graham’s
opening than Gas X at the same temperature?
What is the partial pressure of carbon dioxide in a gas mixture with a total 10.2 kPa
pressure of 30.4 kPa if the partial pressure of the other two gases in the
Dalton’s Law
mixture are 16.5 kPa and 3.7 kPa?
The volume of a gas at 101 kPa is 400 mL. If the pressure changes at
100 mL
constant temperature to 404 kPa, what will be the new volume?
Boyle’s
o
A balloon inflated in a room at 24 C has a volume of 4.00 L. The balloon is 4.46 L
then heated to a temperature of 58oC. What is the new volume if the
Charles’
pressure remains constant?
5.00 L of a gas is known to contain 0.965 mol. If the amount of gas is
9.33 L
increased to 1.80 mol, what new volume will result (at an unchanged
Avogadro’s
temperature and pressure)?
10.0 L of a gas is found to exert 97.0 kPa at 25.0°C. What would be the
required temperature (in Celsius) to change the pressure to standard
pressure?
A sample of carbon dioxide is collected at STP. Its volume is 500 L. What
volume will it have if the pressure is 380 mm Hg and the temperature is
100oC?
38.2°C
Gay-Lussac’s
1370 mL
Combined
Dissolve
In
Water
Why
How many moles of N2 would occupy 5.80 L at 155oC and 1.00 atm?
0.165 moles
Ideal
What is the molar mass of a gas that takes three times longer to effuse than 36 g/mol
helium?
Graham’s
What is the partial pressure of water vapor in an air sample when the total 0.0056 atm
pressure is 1.00 atm, the partial pressure of nitrogen is 0.79 atm, the partial Dalton’s law
pressure of oxygen is 0.20 atm, and the partial pressure of all other gases in
air is 0.0044 atm?
The volume of a gas is 550 mL at 760 mm Hg. If the pressure is reduced to 1100 mL
380 mm Hg and the temperature is constant, what will be the new volume? Boyle’s law
Are
A sample of methane gas at 1.50 atm and 32oC. The sample is put in a
1.25 atm
o
freezer and cooled to -18 C at constant volume. What is the new pressure? Gay-Lusaac’s
Chemists
A 50 mL sample of krypton gas at STP is cooled to -73oC at constant
pressure. What will be the new volume?
36.6 mL
Charles’ law
Great
A gas at 155 kPa and 25oC has an initial volume of 1.00 L. The pressure of
the gas increases to 605 kPa as the temperature is raised to 125oC. What is
the new volume?
How many moles of oxygen will a 500 mL container hold at -20oC and a
pressure of 106 kPa?
0.342 L
Combined gas law
At
Solving
A
Problem
What
Is
A
Scientist’s
Favorite
Kind
Of
Tree
The equation C + O2  CO2 indicates that 24 g of C will produce how
many liters of CO2 at STP?
How many times faster does neon effuse than krypton?
0.025 mol
Ideal
44.8 L
Avogadro’s
2.0 times
Graham’s law
o
If the vapor pressure of water at 22 C is 19.8 mm Hg, what is the pressure 728.8 mm Hg
of pure O2 collected over water at a barometric pressure of 748.6 mm Hg? Dalton’s law
A diver blows a 0.75 L air bubble 10 m under water. As it rises to the
1.6 L
surface, the pressure goes from 2.25 atm to 1.03 atm. What will be the
Boyle’s Law
volume of air in the bubble at the surface?
Air in a closed cylinder is heated from 25oC to 36oC. If the initial pressure 3.94 atm
is 3.8 atm, what is the final pressure?
Gay-Lusaac
A sample of air occupies 2.50 L at a temperature of 22.0oC. What volume 2.68 L
will this sample occupy inside a hot-air balloon at a temperature of 43.0oC? Charles law
Assume that the pressure inside the balloon remains constant.
What will be the final volume of a gas originally occupying 0.700 L if the 0.350 L
pressure changes from 0.8 atm to 2.4 atm and the temperature changes from Combined gas law
300 to 450 K?
How many moles of helium gas would be required to fill a 22 L container at 2.70 moles
a temperature of 35oC and a pressure of 3.1 atm?
Ideal
What volume would 22 g of CO2 occupy at STP?
11.2 L
Avogadro
If 4 moles of O2 and 8 moles of N2 occupy a 12 L container at a pressure of 4 atm
6 atm, what is the partial pressure of N2?
Dalton
How much faster does H2 effuse than butane (C4H10)?
5.4 times
Graham’s
It is in the
ground state
A sample of gas is confined in a manometer. The atmospheric pressure is
98.70 kPa. What is the pressure of the gas sample, if the height of the
mercury in the manometer is 30.0 mm higher on the confined gas side of
the manometer than on the open to the atmosphere side?
It is polar
One end of an open-ended manometer is connected to a canister filled with
a gas at a pressure of 771.0-mm Hg. The Mercury level on the side open to
the atmosphere is 11.2-mm higher than on the side connected to the
canister. What is the atmospheric pressure in mm Hg?
They have all A soccer ball is attached to an open ended manometer. The Mercury level
the solutions in the manometer is 10-mm higher on the side attached to the ball than on
the side open to the atmosphere. Atmospheric pressure has already been
determined to be 770-mm Hg. What is the gas pressure in the ball?
A chemistree A gas container is fitted with a manometer. The level of the mercury is
15-mm lower on the open side. Using a laboratory barometer, you find that
atmospheric pressure is 750-mm Hg. What is the pressure, in atm, of the
gas in the container?
94.7 kPa
759.8 mm Hg
760 mm Hg
765 mm Hg
Name___________________________
Group 1: Fun with Gas Laws!
Solve the problems below. When you get the answer, go to the appropriate card on the wall. Copy the
word from the back of the card in the correct space. When you have finished all eight problems and you have a
riddle, bring it to the front. Bonus points will be awarded if you can answer the riddle. An additional problem
can be solved to reveal the answer.
Word
Problem
Helium takes up 5.71 liters at 273K and 3.95 atm.
What is the volume of the same helium at 273K and
1.05 atm?
What pressure will develop in a system which begins
at 740 mm Hg and 30oC if the temperature changes
to 150oC?
A sample of gas has a volume of 350.0 mL at
27.0°C. The gas is heated at constant pressure until
the volume is 500.0 mL. What is the final
temperature of the gas in degrees Celsius?
0.250 moles of HCl will occupy how many liters at
STP?
What pressure (in mmHg) must a 0.100 L cylinder
hold in order to contain 0.0500 moles of NH3 at
37oC?
2.00 L of a gas is collected at 298 K and 745.0
mmHg. What is the volume at STP?
Gas X has a molar mass of 72 g/mol and Gas Y has a
molar mass of
2 g/mol. How much faster or slower does Gas Y
effuse from a small opening than Gas X at the same
temperature?
What is the partial pressure of carbon dioxide in a
gas mixture with a total pressure of 30.4 kPa if the
partial pressure of the other two gases in the mixture
are 16.5 kPa and 3.7 kPa?
A sample of gas is confined in a manometer. The
atmospheric pressure is 98.70 kPa. What is the
pressure of the gas sample, if the height of the
mercury in the manometer is 30.0 mm higher on the
confined gas side of the manometer than on the open
to the atmosphere side?
Gas Law Used to
Solve Problem
Answer
Names____________________________
Group 2: Fun with Gas Laws!
Solve the problems below. When you get the answer, go to the appropriate card on the wall. Copy the
word from the back of the card in the correct space. When you have finished all eight problems and you have a
riddle, bring it to the front. Bonus points will be awarded if you can answer the riddle. An additional problem
can be solved to reveal the answer.
Word
Problem
The volume of a gas at 101 kPa is 400 mL. If the
pressure changes at constant temperature to 404 kPa,
what will be the new volume?
A balloon inflated in a room at 24oC has a volume of
4.00 L. The balloon is then heated to a temperature
of 58oC. What is the new volume if the pressure
remains constant?
5.00 L of a gas is known to contain 0.965 mol. If the
amount of gas is increased to 1.80 mol, what new
volume will result (at an unchanged temperature and
pressure)?
10.0 L of a gas is found to exert 97.0 kPa at 25.0°C.
What would be the required temperature (in Celsius)
to change the pressure to standard pressure?
A sample of carbon dioxide is collected at STP. Its
volume is 500 L. What volume will it have if the
pressure is 380 mm Hg and the temperature is
100oC?
How many moles of N2 would occupy 5.80 L at
155oC and 1.00 atm?
What is the molar mass of a gas that takes three
times longer to effuse than helium?
What is the partial pressure of water vapor in an air
sample when the total pressure is 1.00 atm, the
partial pressure of nitrogen is 0.79 atm, the partial
pressure of oxygen is 0.20 atm, and the partial
pressure of all other gases in air is 0.0044 atm?
One end of an open-ended manometer is connected
to a canister filled with a gas at a pressure of 771.0mm Hg. The Mercury level on the side open to the
atmosphere is 11.2-mm higher than on the side
connected to the canister. What is the atmospheric
pressure in mm Hg?
Gas Law Used to
Solve Problem
Answer
Names___________________________
Group 3: Fun with Gas Laws!
Solve the problems below. When you get the answer, go to the appropriate card on the wall. Copy the word
from the back of the card in the correct space. When you have finished all eight problems and you have a
riddle, bring it to the front. Bonus points will be awarded if you can answer the riddle. An additional problem
can be solved to reveal the answer.
Word
Problem
The volume of a gas is 550 mL at 760 mm Hg. If
the pressure is reduced to 380 mm Hg and the
temperature is constant, what will be the new
volume?
A sample of methane gas at 1.50 atm and 32oC. The
sample is put in a freezer and cooled to -18oC at
constant volume. What is the new pressure?
A 50 mL sample of krypton gas at STP is cooled to
-73oC at constant pressure. What will be the new
volume?
A gas at 155 kPa and 25oC has an initial volume of
1.00 L. The pressure of the gas increases to 605 kPa
as the temperature is raised to 125oC. What is the
new volume?
How many moles of oxygen will a 500 mL container
hold at -20oC and a pressure of 106 kPa?
What volume would 88 g of CO2 occupy at STP?
How many times faster does neon effuse than
krypton?
If the vapor pressure of water at 22oC is 19.8 mm
Hg, what is the pressure of pure O2 collected over
water at a barometric pressure of 748.6 mm Hg?
A soccer ball is attached to an open ended
manometer. The Mercury level in the manometer is
10-mm higher on the side attached to the ball than on
the side open to the atmosphere. Atmospheric
pressure has already been determined to be
770 mm Hg. What is the gas pressure in the ball?
Gas Law Used to
Solve Problem
Answer
Names____________________________
Group 4: Fun with Gas Laws!
Solve the problems below. When you get the answer, go to the appropriate card on the wall. Copy the word
from the back of the card in the correct space. When you have finished all eight problems and you have a
riddle, bring it to the front. Bonus points will be awarded if you can answer the riddle. An additional problem
can be solved to reveal the answer.
Word
Problem
A diver blows a 0.75 L air bubble 10 m under water.
As it rises to the surface, the pressure goes from 2.25
atm to 1.03 atm. What will be the volume of air in
the bubble at the surface?
Air in a closed cylinder is heated from 25oC to 36oC.
If the initial pressure is 3.8 atm, what is the final
pressure?
A sample of air occupies 2.50 L at a temperature of
22.0oC. What volume will this sample occupy inside
a hot-air balloon at a temperature of 43.0oC?
Assume that the pressure inside the balloon remains
constant.
What will be the final volume of a gas originally
occupying 0.700 L if the pressure changes from 0.8
atm to 2.4 atm and the temperature changes from
300 to 450 K?
How many moles of helium gas would be required to
fill a 22 L container at a temperature of 35oC and a
pressure of 3.1 atm?
What volume would 22 g of CO2 occupy at STP?
If 4 moles of O2 and 8 moles of N2 occupy a 12 L
container at a pressure of 6 atm, what is the partial
pressure of N2?
How much faster does H2 effuse than butane
(C4H10)?
A gas container is fitted with a manometer. The level
of the mercury is 15-mm lower on the open side.
Using a laboratory barometer, you find that
atmospheric pressure is 750-mm Hg. What is the
pressure, in atm, of the gas in the container?
Gas Law Used to
Solve Problem
Answer