AP Chemistry -- van der Waal's Equation Worksheet
1. What model of a gas is proposed by the Kinetic Molecular Theory?
 
2. To what properties of an ideal gas is its temperature proportional?
a)  according to the KMT
b)   according to the combined gas law
 
3. Gases, if left to themselves, must migrate from a region of high pressure to a region of low pressure.  In what specific way can the kinetic molecule theory be used to explain this direction of migration?
 
4.  What aspects of the KMT of gases guarantee that two gases given the freedom to mix will always mix entirely.
 
5. If the molecules of a gas at constant volume are somehow given a lower average kinetic energy, what physical properties of the gas will change (and in what direction)?
 
6. Explain how heating makes a gas expand at constant pressure. (Describe a mechanical model that connects the rising temperature to the response of the gas - expansion).
 
7. According to van der Waals, what postulates of the KMT aren't strictly true?
 
8. What equation does the van der Waals equation become more and more like when the volume of a gas becomes larger and larger without any change in temperature or the number of moles?
 
9. What does a large value for the van der Waals constant b indicate is probably true about the molecules of gas?

10.    A small value for the van der Waals constant a suggests something about the molecules of a gas.  What?

11.
A 12.5 mole sample of acetylene gas has a volume of 25 L at 25oC.  What is the corrected pressure according to van der Waal's?
  
12.
A 3.0 mole sample of nitromethane gas has a volume of 60 L at 25oC.  What is the corrected pressure according to van der Waal's?