Question details

Describe the movement of the atoms or molecules in each state
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https://phet.colorado.edu/en/simulation/legacy/states-of-matter

First observe the solid, liquid, and gas states for Ne, Ar, O, and H2O. 

  • Describe the movement of the atoms or molecules in each state.

Now proceed to the Phase Change tab.  Begin with Ne(s) and add heat.  Identify when the phase change occurs; this requires an understanding of how the solid and liquid differ at the particle-level. 

  • Estimate the temperature for this phase change.  
  • Continue and identify the approximate boiling point Ne(l).  Record the data. 
  • What effect do these phase changes have on the pressure of the system (shown in the upper left).
  • Would the melting point and boiling point be different for a substance with stronger intermolecular forces?  One with weaker intermolecular forces?”
  • Analyze and discuss the relative strength of intermolecular forces. How does molar mass (and polarizability) affect van der Waals forces between neon and argon?
  • Given your experiences, identify the relative strength of H2O’s intermolecular forces when compared to argon and oxygen.
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