Your home freezer is likely set to minus 18°C (0°F), not 0°C. So when you put a tray of water in there, it doesn’t freeze at 0°—it supercools first, then flash-freezes. But here’s a weird fact: ice cubes actually form faster if you use hot water. It’s called the Mpemba effect, and nobody fully understands why. Physics just shrugged and said, “Because I’m weird.”
So next time you’re impatient for a cocktail, boil your water first. You’ll get cloudy, weird cubes that taste a bit off—but they’ll be faster. Priorities.
Freezing Point Of Water In Celsius
The Salt Shaker Strikes Again
Why does your car’s windshield ice up at -2°C but not at 0°C? Because that’s not pure water on the road—it’s impure water. Salt, dirt, and road grime lower the freezing point of water down to about -6°C or lower. That’s why municipalities dump tons of rock salt on highways. They’re basically saying, “Ice, you’re not welcome here until it’s really, really cold.”
In fact, you can freeze water at -21°C if you add enough salt. That’s why you can make homemade ice cream in a bag with salt and ice—you’re creating a brine so cold it freezes your cream. Science is just cooking with vengeance.
