19hertz

ramblings of an electronic engineer.


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Slurpies

Seriously who doesn’t like slurpies? In fact one of my friends loves them so much when he gets his first home he aspires to owning 3 7-Eleven slurpie machines and have 3 flavours on tap. Having said that I’ve never thought about how a slurpie machine actually works, nor the actual temperature of the slurpie mixture comming out (-3°C). You see slurpies are mostly made of water which we all know freezes at 0°C so why doesn’t the slurpie mixture just freeze into one solid block? The answer is twofold.

1) Sugar acts as an antifreeze agent.

2) The mixture is continually agitated.

The following video does a great job explaining these two phenomena.