Bonding Part 2

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Bonding Part 2
2012-01-17 11:54:55
intermolecular forces hydrogen bonding dispersion

NYS Regents Chemistry Review for Unit Test
Show Answers:

  1. What is higher due to a greater intermolecular force?
    Boiling point increases with an increase in intermolecular forces
  2. When potassium bromide dissolves in water, what will be attracted to the hydrogen end of the water molecule and Why?
    Bromide ions will attract to the water end of the molecule because that end is positive and bromide is negatively charged.
  3. What would cause a substance to have stronger dispersion forces than another?
    The larger the molecule (so greater number of electrons) creates a greater dispersion force.
  4. What type of force occurs between polar molecules?
  5. What type of force exists between nonpolar molecules?
    London dipsersion forces
  6. Explain why water, although a very small molecule, is a liquid at room temperature.
    Strong hydrogen bonding causes water to be a liquid.
  7. Give 3 examples of nonpolar molecules that contain polar bonds
    CO2 CH4 CCl4
  8. Give two examples of classic polar molecules
    H2O NH3 or HCl or HF
  9. Explian why some solid substances are able to sublime. Use an example
    I2 (s) or CO2 (s) are able to sublime due to the weak intermolecular forces (Dispersion)
  10. Which organic would have the lower boiling point, butane or hexane? Explain
    Butane because it is the smaller molecule and so would have weaker dispersion forces.
  11. What bond type results in an unequal charge distribution in the molecule?
    Polar Covalent
  12. What force holds nitrogen molecules together in the liquid state?
    Dispersion forces
  13. The strongest hydrogen bonds are formed between molecules in which hydrogen is bonded to an element with ____ electronegativity and a ____ radius.
    The strongest hydrogen bonds are formed between molecules in which hydrogen is bonded to an element with high electronegativity and a small radius.
  14. What causes the strenghth of hydrogen bonding to increase?
    Themore polar the molecule, the stronger the force.
  15. What state of matter do each of the halogens exist at room temperature?
    b) explain why this is in terms of intermolecular forces
    • F2: gas Cl2: gas Br2: liq I2: solid
    • b) the larger the molecule, the stronger the dispersion force
  16. What forces exist between liquid Krypton atoms?
    Dispersion forces