When he was the Director of the Russian Bureau of Standards, Mendeleev, the chemist who invented the periodic table, regulated the proportion of ethyl alcohol--or ethanol--in vodka. Russian vodka contains 40% ethanol and 60% water by volume (80 proof). Other countries' vodka may contain between 35% and 50% ethanol by volume. All of these numbers are alcoholic enough to have a substantial effect on the freezing temperature of the liquid. If it were pure water, it would freeze at 0 degrees Celsius or 32 degrees Fahrenheit. If vodka were pure or absolute alcohol, it would freeze at -114 degrees Celsius or -173 degrees Fahrenheit. The freezing point of the combination is in the middle.
Any liquid that is dissolved in water lowers the freezing point of the water. This is referred to as freezing point depression. Vodka can be frozen, although not in a standard home freezer. The freezing point of 80 proof vodka is -26.95 C or -16.51 F, while the average home freezer temperature is roughly -17 C.
Put your vodka in a bucket with salt and ice to get it super cold. As an example of freezing point depression, the contents will then become colder than typical ice. The salt reduces the temperature to -21 C, which is not cold enough to freeze 80 proof vodka but will create a vodka-sicle out of a little less alcoholic result. Salting ice is also used to manufacture ice cream in the absence of a freezer.You can use liquid nitrogen or dry ice to effectively freeze your vodka. Dry ice is used to lower the temperature around vodka to -78 C, or -109 F. Vodka becomes effectively carbonated (which also has a different flavor) if dry ice chips are added, as the sublimation of carbon dioxide creates bubbles in the drink. It should be noted that freezing the vodka would result in a drink that is too cold to consume . However, adding a tiny amount of dry ice to create bubbles is OK.
When you add a little liquid nitrogen to vodka, it produces fog when the nitrogen evaporates. This is a fantastic trick that may result in vodka ice. Liquid nitrogen is extremely cold, reaching temperatures of -196 C or -320 F. While bartenders may utilize liquid nitrogen to create (literally) cool effects, it is vital to exercise prudence. Frozen vodka is colder than a freezer, making it practically impossible to consume!
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