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Chapter 16 Notes
Chapter 16 Notes

Thermodynamic Properties of Hydrated and Ammoniated Electrons
Thermodynamic Properties of Hydrated and Ammoniated Electrons

... from the bulk of the solvent to the first solvation layer. The new solvent arrangement in the first coordination layer is looser than in the bulk, so that the molecules in the first solvation layer have a larger number of degrees of freedom than in the bulk. It thus seems reasonable that So,- should ...
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Ultrathin Films and Some Cross Effect
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Glass transition



The glass–liquid transition or glass transition for short is the reversible transition in amorphous materials (or in amorphous regions within semicrystalline materials) from a hard and relatively brittle state into a molten or rubber-like state. An amorphous solid that exhibits a glass transition is called a glass. Supercooling a viscous liquid into the glass state is called vitrification, from the Latin vitreum, ""glass"" via French vitrifier.Despite the massive change in the physical properties of a material through its glass transition, the transition is not itself a phase transition of any kind; rather it is a laboratory phenomenon extending over a range of temperature and defined by one of several conventions. Such conventions include a constant cooling rate (20 K/min) and a viscosity threshold of 1012 Pa·s, among others. Upon cooling or heating through this glass-transition range, the material also exhibits a smooth step in the thermal-expansion coefficient and in the specific heat, with the location of these effects again being dependent on the history of the material. However, the question of whether some phase transition underlies the glass transition is a matter of continuing research.The glass-transition temperature Tg is always lower than the melting temperature, Tm, of the crystalline state of the material, if one exists.
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