Name:________________________________________ Date:________________________ Per:______
Gas Laws Review
Identifying the Gas Laws: Read the descriptions below and write the name and formula of the
correct gas law.
1. _______________________Law is calculated with volume and temperature variables
and has a constant pressure. What is the formula: ___________________________
2. _______________________Law is calculated with pressure and volume variables and
has a constant temperature. What is the formula:____________________________
3. _______________________ Law is calculated with pressure and temperature variables
and has constant volume. What is the formula: ______________________________
4. _______________________Law is a combination of Boyle’s Law and Charles’s Law.
What is the formula:____________________________________________________
How do the Gas Laws Work:
5.
Look at the picture below. According to Boyle’s Law, what would happen to volume if
pressure is increased? _____________________________________________________
6. Look at the picture below. According to Charles’s Law, what would happen to the
volume if temperature were increased? ______________________________________
Name:________________________________________ Date:________________________ Per:______
Gas Laws Review
7.
Look at the picture below. According to Gay-Lussac’s Law, what would happen to
pressure if temperature were increased? ______________________________________
Units in the Gas Laws:
8.
Identify which variable belongs to the given unit: P (pressure), T (temperature),
V (volume)
a) mmHg, kPa, Pa, torr, atm: _________________
b) K, ◦C : ___________________
c) mL, L: __________________
Conversions: Convert the following using the following conversion factors. Show all
mathematical work—
K = C + 273 1L = 1000 mL
1 atm = 760 mmHg
1 atm = 760 torr 1 atm = 101,325 Pa
1 atm = 101.3 kPa
9. Convert 843K to Celcius:
10. Convert 35 ◦C to Kelvin:
11. Convert 955 mmHg to torr:
12. Convert 3.12 atm to torr:
STP
13. What does STP stand for? ________________________________________________
14. What is the value of pressure (in atm) at STP? _________________
15. What is the value of temperature (in C) at STP? ________________
Name:________________________________________ Date:________________________ Per:______
Gas Laws Review
16. What is the volume of 1 mole of gas at STP? __________________
Ideal Gas Law:
17. A real gas will act like an ideal gas when gas particles are (close / far apart) __________
18. Gas behavior is most ideal when gases are at (low/high)__________________
temperatures and (low/high) _______________________ pressures.
19. Gas behavior is most ideal in nonpolar atoms/molecules. Why is water vapor behavior
NOT ideal? ____________________________________________________________.
20. The formula for the Ideal Gas Law is PV = nRT. What does each of the variables stand
for?
P =_________________, V= ________________, n= _________________,
R = _____________, T=____________________
Which of these variables can you not solve for because it is a constant? ___________
21. In your own words, define pressure? _________________________________________
_______________________________________________________________________
Solving Gas Law Problems:
22. The volume of a gas is 40 mL at 15.0 K. What will be the new temperature if the gas
is compressed to 10 mL under constant pressure? (Hint: Notice that this problem deals
with volume and temperature. Use the Gas law that deals with volume and temperature)
23. A sample of a gas in a container at 25 C and 3.00 atm has its temperature increased to
35 C. What will be the new pressure?
24. What is the new pressure of 200 mL of a gas that is compressed to 60 mL when the
original pressure was 4.0 atm and the temperature is constant?
Name:________________________________________ Date:________________________ Per:______
Gas Laws Review
25. Assume that the volume of a gas at STP is said to be 38.20 mL. How many moles of this
gas are produced if 1 mol of a gas is 22.4L?
26. Calculate the approximate volume of a 3.00 mol sample of gas at 20 C and a pressure of
4.50 atm.
27. The volume of a sample of hydrogen is 100.0 mL when the pressure is 2 atm and the
temperature is 27.0 C. What is the new temperature if the volume increases to 300.0 mL
and the pressure decreases to 1 atm?
28. Observe the formula for the ideal gas law, PV = nRT. How would you manipulate this
formula to solve for Pressure?_____________________________________
Using your answer above, which volume would give you the greatest pressure, 20 mL or
40 mL? Explain? ________________________________________________________
_______________________________________________________________________
29. A certain amount of gas is placed in a container of fixed volume at a temperature of
32 C. The gas has a pressure of “P.” Write an expression to show how you would solve
for the pressure of the gas at 45C.
30. A sample of oxygen gas occupies 1.0 L at 2 atm in a balloon. If the temperature is kept
constant, what is the volume of the gas in Liters when the pressure is raised to 3.5 atm?
Write the expression to show how you would solve this problem.