Name______Period_____

Gas Law Mixed Review Practice Problems

Match the appropriate law with its representative mathematical equation.

  1. ______Boyle’s Lawa. P1V1/T1 = P2V2/T2
  2. ______Charle’s Lawb. PV = nRT
  3. ______Ideal Gas Lawc. P1/T1 = P2/T2
  4. ______Gay-Lussac’s Lawd. P1V1 = P2V2
  5. ______Combined Gas Lawe. V1/T1 = V2/T2

Match the appropriate law with its representative definition.

  1. ______Boyle’s Lawa. volume varies directly with Kelvin temp.
  2. ______Charle’s Lawb. used when all three variables are changing
  3. ______Gay-Lussac’s Lawc. pressure varies inversely with volume
  4. ______Combined Gas Lawd. pressure varies directly with Kelvin temp.

10. What is STP? What is its value?

11. How do you convert from Celsius to Kelvin?

12. How do Boyle’s Law, Charles’ Law and Gay-Lussac’s Laws relate to the Combined Gas Law?

13. Compare and contrast an ideal gas and a real gas?

14. What assumptions do we make when we talk about ideal gases?

15. What are the 4 variables that we have to consider when we work with gases?

Determine which law is applicable and solve each of the following problems.

16.The pressure in an automobile tire is 1.88 atm at 25.0C. What will be the pressure if the temperature warms up to 37.0C?

1.96 atm

17.Helium gas in a 2.00-L cylinder is under 1.12 atm pressure. At 36.5C, that same gas sample has a pressure of 2.56 atm. What was the initial temperature of the gas in the cylinder?

135K

18.A sample of oxygen gas occupies a volume of 250. mL at 740 kPa pressure. What volume will it occupy at 800. kPa pressure?.231 L or 231 mL

19.An 8.00 L sample of neon gas at 25 ºC exerts a pressure of 900 kPa. If the gas is compressed to 2.00 L and the temperature is raised to 225 ºC, what will the new pressure be?

6.02 x 103KPa

20. What is the pressure of a fixed volume of a gas at 30.0C if it has a pressure of 1.11 atm at 15.0C?

1.17 atm

21. The gas in a 10.0 L container exerts a pressure of 100. kPa. What pressure is needed to compress the gas to 2.0 L while keeping the temperature constant?

5.0 x 102 KPa

22. A 1.5 L pocket of air with a temperature of 295 K rises in the air. What will be the volume of the air pocket if the temperature is decreased to 275 K and the pressure is not changed?

1.4 L

23. A 952 cm3 container of gas is exerting a pressure of 108 kPa while at atemperature of 48 °C. Calculate the pressure of this same amount of gas in a1236 cm3 container at a temperature of 64 °C.

87.3 KPa

24. A 3.25 L container of ammonia gas exerts a pressure of 652 mm Hg at atemperature of 243 K. Calculate the pressure of this same amount of gas in a2.50 L container at a temperature of 221 K.

771 mm Hg

25. How many moles of argon are there in a 22.4 L sample of gas at 101.3 kPa and0 °C?

1.00 mol

26. A 500.0 g block of dry ice (solid CO2, molar mass = 44.0 g) vaporizes to a gas atroom temperature. Calculate the volume of gas produced at 25.0oC and 1.50atm.

186 L