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.