Section 14.1 The Gas Laws

Practice Test
      
  1.The pressure of a sample of helium in a 1.0-L container is 0.857 atm. What is the new pressure if the sample is placed in a 0.5-L container? (Assume the temperature is constant.)  
  a.   0.143 atm  
  b.   0.429 atm  
  c.   1.38 atm  
  d.   1.71 atm  
  Hint    
      
  2.A sample of gas is held in a 10.0-L volume at 175 kPa. The temperature is kept constant while the volume is decreased until the pressure is 350 kPa. What is the new volume of the gas?  
  a.   1.0 L  
  b.   5.0 L  
  c.   10.0 L  
  d.   175 L  
  Hint    
      
  3.A 0.5-L container of nitrogen gas is heated under constant pressure to the boiling point of water. What is its new volume?  
  a.   0.5 L  
  b.   0.64 L  
  c.   0.79 L  
  d.   0.86 L  
  Hint    
      
  4.How can gases be defined?  
  a.   a physical state of matter that does not have a fixed shape or a fixed volume  
  b.   a physical state of matter that does not have a fixed shape but has a fixed volume  
  c.   a physical state of matter that has a fixed volume and a fixed shape  
  d.   a chemical state of matter  
  Hint    
      
  5.Particles of matter that are in constant, random motion and that have a size that is much smaller than the distance between them are _____________.  
  a.   solids  
  b.   liquids  
  c.   gases  
  d.   solutions  
  Hint    
      
  6.What is the name given to the relationship that shows that an increase in pressure leads to a decrease in the volume of a gas?  
  a.   Charles’s law  
  b.   Boyle’s law  
  c.   Avogadro’s number  
  d.   Gay-Lussac’s law  
  Hint    
      
  7.How can the relationship between a gas at two sets of conditions be expressed mathematically by Boyle’s law?  
  a.   P1V1 = P2V2  
  b.   P1/V1 = P2/V2  
  c.   V1/T1 = V2/T2  
  d.   V1T1 = V2T2  
  Hint    
      
  8.What relationship is demonstrated by the expansion of a gas—filled balloon when it is heated?  
  a.   Charles’s law  
  b.   Boyle’s law  
  c.   Avogadro’s number  
  d.   Gay-Lussac’s law  
  Hint    
      
  9.A gas occupies a volume of 1.0 L at 1.0 atm pressure. What is the pressure when the gas expands to fill 2.0 L?  
  a.   0.50 atm  
  b.   2.0 atm  
  c.   1.0 atm  
  d.   10 atm  
  Hint    
      
  10.A gas occupies a volume of 1.0 L at 25°C. What volume will the gas occupy at 100°C?  
  a.   1.0 L  
  b.   1.3 L  
  c.   0.80 L  
  d.   4.0 L  
  Hint    
      
  11.A gas occupies 2.0 L at STP. What volume will the gas occupy if the pressure is increased to 2.0 atm, and the temperature is kept constant?  
  a.   1.0 L  
  b.   4.0 L  
  c.   0.50 L  
  d.   2.0 L  
  Hint    
      
  12.A sample of helium occupies 2.20 L at 1.0 atm. What is the volume at 1.5 atm?  
  a.   1.5 L  
  b.   0.68 L  
  c.   2.20 L  
  d.   1.0 L  
  Hint    
      
  13.When will the molecules of all samples of ideal gases have the same average kinetic energies?  
  a.   at constant volume  
  b.   at constant temperature  
  c.   at constant amount  
  d.   at constant pressure  
  Hint    

 
   
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