Describe what happens to molecules of ice as heat or energy is added to it after it is removed from the freezer. Include a discussion of energy…

  1. Describe what happens to molecules of ice as heat or energy is added to it after it is removed from the freezer. Include a discussion of energy transfers and what is happening at the molecular level. Describe how this is shown in a phase diagram and heating curve of water.
  2. Based on your knowledge of VSEPR theory, compare the geometries of PBr3 and CCl4. How many shared and unshared pairs of electrons can be found around the central atom of each? What type of bonds are around the central atom of each? Are the molecules polar or nonpolar? Explain how a Lewis dot diagram and VSEPR Theory allows you to make these predictions. 

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