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The Mpemba effect is the name given to the observation that a liquid (typically water) that is initially hot can freeze faster than the same liquid which begins cold, under otherwise similar conditions. There is disagreement about its theoretical basis and the parameters required to produce the effect.
21. Cakes. Cakes adorned with delicate frostings or fillings, such as whipped cream or fruit compotes, can undergo unfavorable changes when frozen.
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Most liquids freeze by crystallization, formation of crystalline solid from the uniform liquid. This is a first-order thermodynamic phase transition, which means that as long as solid and liquid coexist, the temperature of the whole system remains very nearly equal to the melting point due to the slow removal of heat when in contact with air, which is a poor heat conductor.
Filtering is sometimes done in the still during distillation, as well as afterward, where the distilled vodka is filtered through activated charcoal and other media to absorb trace amounts of substances that alter or impart off-flavors to the vodka. However, this is not the case in the traditional vodka-producing nations, so many distillers ...
Clear spirits made with a neutral grain base, such as vodka or gin, will be the least impacted by the subzero temps. “Clear spirits will have probably the least effect,” he says.
Typically, when considering the quality of a powdered product such as coffee, freeze drying seems to be better than spray drying, but this does not apply to alcohol powder production. In fact, "freeze-dried beer spice" was made by university students for their research. Carbon dioxide, water and alcohol have all been lost. [22] Due to the ...
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