what is its thermodynamics view?
The molecules within a pure, "perfect crystal", when heated by an external source, will become liquid. This occurs at a sharply defined temperature. As it liquifies, the complicated architecture of the crystal collapses. Melting occurs because the entropy gain in the system by spatial randomization of the molecules has overcome the enthalpy loss due to breaking the crystal packing forces.
Crystallization
The molecules within a pure, "perfect crystal", when heated by an external source, will become liquid. This occurs at a sharply defined temperature (different for each type of crystal). As it liquifies, the complicated architecture of the crystal collapses. Melting occurs because the entropy ("S") gain in the system by spatial randomization of the molecules has overcome the enthalpy ("H") loss due to breaking the crystal packing forces:
name two articles that can be made from glass Window panes and tableware. how can you describe its microscopic structure? Although the atomic-scale structure of it shares characteristics of the structure of a supercooled liquid, glass exhibits all the mechanical properties of a solid. As in other amorphous solids, its atomic structure lacks the long-range periodicity observed in crystalline solids. Due to chemical bonding constraints, they do possess a high degree of short-range order with respect to local atomic polyhedra. how it is formed? For melt quenching, if the cooling is sufficiently rapid then crystallization is prevented and instead the disordered atomic configuration of the supercooled liquid is frozen into the solid state at T. The tendency for a material to form a glass while quenched is called glass-forming ability. what is process you just mentioned? “Crystallization” is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. what are methods involve in this process? Crystal formation can be achieved by various methods, such as: cooling, evaporation, addition of a second solvent to reduce the solubility of the solute, solvent layering, sublimation, changing the cation or anion, as well as other methods.
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Crystallization [SEP] Thermodynamic view
The crystallization process appears to violate the second principle of thermodynamics. Whereas most processes that yield more orderly results are achieved by applying heat, crystals usually form at lower temperatures—especially by supercooling. However, due to the release of the heat of fusion during crystallization, the entropy of the universe increases, thus this principle remains unaltered. The molecules within a pure, "perfect crystal", when heated by an external source, will become liquid. This occurs at a sharply defined temperature (different for each type of crystal). As it liquifies, the complicated architecture of the crystal collapses. Melting occurs because the entropy ("S") gain in the system by spatial randomization of the molecules has overcome the enthalpy ("H") loss due to breaking the crystal packing forces: Regarding crystals, there are no exceptions to this rule.