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Melting-point depression is the phenomenon of reduction of the melting point of a material with a reduction of its size. This phenomenon is very prominent in nanoscale materials , which melt at temperatures hundreds of degrees lower than bulk materials.
Gibbs-Thomson melting point depression for 10 different pore-size sol-gel silicas plotted against measured gas-adsorption diameter. NMR Cryoporometric melting curve for an SBA-15 porous silica. This shows a very sharp melting at a Gibbs-Thomson depressed melting point of about 13C, due to the uniform size of the cylindrical pores.
The melting point (or, rarely, liquefaction point) of a substance is the temperature at which it changes state from solid to liquid. ... Freezing-point depression
This Wikipedia page provides a comprehensive list of boiling and freezing points for various solvents.
Freezing-point depression can also be used as a purity analysis tool when analyzed by differential scanning calorimetry. The results obtained are in mol%, but the method has its place, where other methods of analysis fail. In the laboratory, lauric acid may be used to investigate the molar mass of an unknown substance via the freezing-point ...
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Investigators recognized that the melting point depression occurred when the change in surface energy was significant compared to the latent heat of the phase transition, which condition obtained in the case of very small particles. [15] Neither Josiah Willard Gibbs nor William Thomson (Lord Kelvin) derived the Gibbs–Thomson equation. [16]
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