CH 13 LECTURE 1 INTERMOLECULAR FORCES

CH 13 LECTURE 1 INTERMOLECULAR FORCES - CH # 13 Types of...

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CH # 13 Types of Intermolecular Forces States of Matter and KMT In liquids and solids particles are close enough to have attractive forces present. In molecular solids and liquids the forces between molecules, the intermolecular forces are based on various electrostatic attractions that are weaker than the forces between oppositely charged ions Coulombs law: F = q 1 q 2 / r 2
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Intermolecular Forces influence things like: Melting point (m.p.) and boiling point (b.p.) Solubility of gases, liquids and solids in solvents Structure determination as in DNA and proteins
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Types of Intermolecular Forces First a short review: Bonding or intramolecular forces arise form electrostatic attractions between opposite charges. Ionic Cation-anion 400-4000 kJ/mol ex. NaCl Covalent Nuclei-shared e- pair 150-1100 kJ/mol ex.H – H Metallic Cations delocalized e- 75-100 kJ/ mol ex. Fe Easy to comprehend and understand using Coulombs law: F is proportional to q 1 q 2 / r 2 (I will refer to this frequently, be familiar with what the equation means.)
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Intermolecular forces are due to attraction between molecules because of partial charges or attraction of ions and molecules. These two types of forces differ in
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CH 13 LECTURE 1 INTERMOLECULAR FORCES - CH # 13 Types of...

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