Make Ice Cubes Faster Using Hot Water

You are at a cocktail party and you find that, to your chagrin, you forgot to fill your ice tray. Don’t worry, try this trick with ice cubes that freeze quickly: Fill an ice cube tray with hot water and place it in the freezer.

This phenomenon, calledthe Mpemba effect , may seem like the opposite, but it actually works reliably. You will get frozen ice cubes much faster if you start with hot water than with cold water. One explanation has to do with the molecular forces that arise between oxygen and hydrogen atoms inside an individual water molecule (calledcovalent bonds ) and between water molecules (due tohydrogen bonds ).

You can read more about the process here , but for now, if you need ice sooner rather than later, this is your fastest option – aside from running out to buy a bag of ice.

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