24.0 Gas Laws 6

10 Questions | Total Attempts: 28

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24.0 Gas Laws 6

Boyle's, Charles', Ideal Gas Law, Combined gas law.


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 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 the 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 2.2 L, 1.1 atmospheres and 32 degrees Celsius. The environment is changed and the balloon is now 1.8 L and 1.4 atmospheres. What is the new temperature? Hint 1: Always change temperature to Kelvin scale. Hint 2: Pressure, volume and temperature are all changed. Use the combined gas law:
    • A. 

      317.6 K

    • B. 

      33.32 K

    • C. 

      384.3 K

    • D. 

      0.02 K

  • 7. 
    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

  • 8. 
    What is the volume of  2 moles of Helium at a temperature of 32 degreees 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 are 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

  • 9. 
    What is the temerature 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

  • 10. 
    How many moles is 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