11.intermolecular forces key

11.intermolecular forces key - Chem 105 Nielson Recitation...

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Chem 105 Nielson Recitation 10/25/07 Intermolecular forces London forces Dipole-dipole Hydrogen bonding 1. All of the halogens exist as diatomic molecules in their elemental form, but Cl 2 is a gas, Br 2 is a liquid, and I 2 is a solid. Explain why they exist as different states of matter. Ans. The only intermolecular force that each of these experience is London force. The I2 is more polarizable, because of its size and number of electrons. 2. Consider the two molecules BrCl and IBr. One is a solid and one is a gas at room temperature. Which is the gas? Ans. In this case the molecules both have London forces and dipole-dipole interactions. The dipole-dipole interactions are probably similar though, so the London forces must be used to determine the relative strength of the intermolecular attractions. The BrCl is the gas. 3. The boiling point of a material is directly related to the strength of the intermolecular attractions between molecules of the material. Compare the boiling points of F 2 and HCl. F
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11.intermolecular forces key - Chem 105 Nielson Recitation...

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