The Gas Law Quiz: Chemistry Trivia!

29 Questions | Total Attempts: 405

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The Gas Law Quiz: Chemistry Trivia!

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Questions and Answers
  • 1. 
    Which law compares gases at two different sets of conditions, with temperature as a constant and pressure and volume as variables?
    • A. 

      Charle's Law

    • B. 

      Boyle's Law

    • C. 

      Combined Gas Law

    • D. 

      Ideal gas law

  • 2. 
    If the pressure of a gas is 1.2 atmospheres with a volume of 12 L, how much pressure is exerted by the gas if the volume is changed to 9L? (Assume constant temperature)
    • A. 

      .9 L

    • B. 

      129.6 L

    • C. 

      6.0 L

    • D. 

      1.6 L

  • 3. 
    If the pressure of a gas is 103.2 kPa at a temperature of 100 Celsius and a volume of 4L is changed to a lower pressure of 80 kPa and 100 degrees celsius, what will be the new volume? (Hint: kPa is kilo pascals -- a unit of measure for pressure).
    • A. 

      2,064 L

    • B. 

      0.3225 L

    • C. 

      5.16 L

    • D. 

      3.1 L

  • 4. 
    A gas at a temperature of 80Celsius and a volume of 3.2 Liters is brought into an area with a temperature of 100 Celsius, what is the new volume if the pressure remains constant? Hint 1: This is Charles law (V1/T1 = V2/T2) Hint 2: ALL GAS PROBLEMS MUST use the KELVIN temperature scale. (To change from Celsius to Kelvin: add 273)
    • A. 

      3.38 L

    • B. 

      2.84 L

    • C. 

      3.75 L

    • D. 

      2.4 L

  • 5. 
    A gas at a temperature of 34 Celsius and a volume of 6.3  Liters is brought into a new area where the gas expands to a volume of 8.0 Liters. What is the new temperature? (Assume constant Pressure)
    • A. 

      43.17 K

    • B. 

      389.84 K

    • C. 

      0.164 K

    • D. 

      1.48 K

  • 6. 
    A gas in a balloon measures 3.6 L, 0.9 atmospheres, and 34 degrees Celsius. The environment is changed and the balloon is now 1.4 atmospheres at a temperature of 38 degrees Celsius. What is the new volume?
    • A. 

      2.59 L

    • B. 

      4.6 L

    • C. 

      220,961 L

    • D. 

      2.34 L

  • 7. 
    What is the volume of  2 moles of Helium at a temperature of 32 degrees Celsius and a pressure of 1.1 atmospheres? Given R = 0.08321 Latm/molK  and 8.314 kPa L/mol K Hint: There is only 1 set of conditions for this gas problem and the moles of the gas is given. This indicates the ideal gas law: PV = nRT.  Remember that is equal to the number of moles. P is the pressure, V is the volume and T is the temperature (change to Kelvin). The R MUST match the units in the rest of the problem.  IF pressure is given in atmosphere, then use R = 0.08321 Latm/molK . IF pressure was given in kPa, then use 8.314 Kpa L/mol K Note also that volume MUST be in Liters and Temperature (as for all gas problems) must be in Kelvin.
    • A. 

      13.96 L

    • B. 

      .45 L

    • C. 

      46.14 L

    • D. 

      4,610 L

  • 8. 
    What is the temperature of  3.4 moles of Helium at a  pressure of 1.1 atmospheres and a volume of 3.7 Liters? (What is the temperature in Kelvin?) Given R = 0.08321 Latm/molK  and 8.314 kPa L/mol K
    • A. 

      14.39 K

    • B. 

      12.15 K

    • C. 

      0.1 K

    • D. 

      142 K

  • 9. 
    How many moles are present in a container that is 79.9 Liters with a pressure of 105 kPa and a temperature of 24 degrees Celsius? Given R = 0.08321 Latm/molK  and 8.314 kPa L/mol K
    • A. 

      2.7 moles

    • B. 

      271 moles

    • C. 

      3.4 moles

    • D. 

      5.6 moles

  • 10. 
    According to Charles Law, if you have a balloon inside a car at noon  during a hot summer day the balloon molecules inside will increase in pressure.
    • A. 

      True

    • B. 

      False

  • 11. 
    In a nitrogen gas occupies has a volume of 500ml at a pressure of 0.971atm.What volume will the gas occupy at a pressure of 1.50 atm, assuming the temperature remains constant?
    • A. 

      342mL

    • B. 

      424mL

    • C. 

      324mL

    • D. 

      442mL

    • E. 

      242mL

  • 12. 
    Not all Gas Law problems have Kelvin (K) as the unit of temperature. They can be expressed in Celsius (°C)and Fahrenheit(°F). So convert 123°C to K.
    • A. 

      396K

    • B. 

      486K

    • C. 

      369K

    • D. 

      458K

    • E. 

      693K

  • 13. 
    Gas pressure is caused by
    • A. 

      Gas molecules heating up

    • B. 

      Gas molecules reacting with other gas molecules

    • C. 

      Gas molecules hitting the walls of a container

    • D. 

      Gas molecules hitting other gas molecules

  • 14. 
    At a pressure of 5.0 atmospheres, a sample of gas occupies 40. liters. What volume will the same sample occupy at 1.0 atmosphere?
    • A. 

      0.0050 L

    • B. 

      0.13 L

    • C. 

      200 L

    • D. 

      8.0 L

  • 15. 
    As the volume of confined gad decreases at a constant temperature, the pressure exerted by the gas ______
    • A. 

      Decreases

    • B. 

      Increases

    • C. 

      Stay the same

    • D. 

      Fluctuates

  • 16. 
    1.    A sample of argon has a volume of 0.43 mL at 299K. At what temperature in degrees Celsius will it have a volume of 1 mL.
    • A. 

      695°C

    • B. 

      422°C

    • C. 

      428°C

    • D. 

      694°C

  • 17. 
    Each of these flasks contains the same number of molecules. In which container is the pressure highest?
    • A. 

      Flask 1

    • B. 

      Flask 2

    • C. 

      Flask 3

    • D. 

      Flask 4

    • E. 

      Flask 5

  • 18. 
    Why would the pressure of a sample of gas at a constant volume fall 75 mmHg?
    • A. 

      The container exploded

    • B. 

      The temperature increased

    • C. 

      The temperature decreased

    • D. 

      Fewer particles were present

  • 19. 
    If two moving steel balls collide, their total energy after the collision is the same as before.  This is an example of
    • A. 

      Boyle's law

    • B. 

      The law of gravity

    • C. 

      An elastic collision

    • D. 

      Both Boyle's and Charles's law.

  • 20. 
    A sample of oxygen occupies 560. mL when the pressure is 800.00 mmHg.  At constant temperature, what volume does the gas occupy when the pressure decreases to 700.0 mmHg?
    • A. 

      80.0 mL

    • B. 

      490. mL

    • C. 

      600. mL

    • D. 

      640. mL

  • 21. 
    What pressure (atm) is exerted by .750 mol of a gas at a temperature of 273 K and a volume of 5.00 L?
    • A. 

      2.1 atm

    • B. 

      3.4 atm

    • C. 

      4.98 atm

    • D. 

      760 atm

  • 22. 
    A sample of gas at 25ºC has a volume of 11 L and exerts a pressure of 660 mmHg.  How many moles of the gas are in the sample?
    • A. 

      .39 mol

    • B. 

      3.9 mol

    • C. 

      9.3 mol

    • D. 

      87 mol

  • 23. 
    The pressure is the force per unit.
    • A. 

      Volume

    • B. 

      Area

    • C. 

      Length

    • D. 

      Depth

  • 24. 
    A 180.0 mL volume of gas is measured at 87ºC.  If the pressure remains unchanged, what is the volume of the gas at standard temperature?
    • A. 

      0.0 mL

    • B. 

      0.5 mL

    • C. 

      137 mL

    • D. 

      410 mL

  • 25. 
    A gas sample with a mass of .467 g is collected at 20ºC amd 732.5 mmHg.  The volume is 200. mL.  What is the molar mass of the gas?
    • A. 

      58 g/mol

    • B. 

      180 g/mol

    • C. 

      290 g/mol

    • D. 

      730 g/mol

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