CHM135H1 Lecture : Notes taken during lecture
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CHM135H1 Full Course Notes
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2 intermolecular forces determine state of matter for instance, if intermolecular forces very strong, state of matter is solid. 2 molecules approach each other, not bonding opposites attract the stronger the charges, the stronger the attraction. Mixtures are where dipole-dipole interactions occur: need for ions and polar molecules leftside: lower energy state with many attraction forces rightside: dipoles are moving around. How readily dispersed range of ion-dipole strength because it depends on charge of ion, and size of molecule"s dipole. London dispersion forces range from smaller to larger than dipole- dipole"s range. Large molecules have strong dispersion forces because of the presence of many electrons. Most electrons means strongest dispersion forces plateaus are where melting and boiling occurs energy goes into overcoming intermolecular forces. Ex. sugar cube into coffee spontaneously dissolves. Upward-pointing arrow depends on temperature if spontaneous or not. Volume does change ex. liquid to gas equilibrium having evaporating water while also have gases www. notesolution. com.
