ENGR 1A Lecture Notes - Lecture 3: Valence Bond Theory, Orbital Hybridisation, Intermolecular Force

• School: UC-Irvine
• Department: Engineering
• Course: ENGR 1A
• Professor: Alon Gorodetsky

Document Summary

Heteronuclear problems mo (look over) only up to band structure for midterm nonbonding and antibonding is different. Intermolecular forces control how well molecules stick together. This affects many of the measurable physical properties of substances: If molecules stick together more, they"ll be tougher to break apart. Stronger intermolecular forces higher melting and boiling points. Viscosity is a measure of how well substances flow. Surface tension is a measure of the toughness of the surface of a liquid. Stronger intermolecular forces higher surface tension. This is a small amount of gas that is found above all liquids. Refer to our lesson about vapour pressure to learn about it. Stronger intermolecular forces lower vapour pressure. Polarity and imfs (intermolecular forces) are related in that there are two types of imfs that can be in polar covalent molecules and one imf that can be the force affecting nonpolar covalent molecules.