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Quantum physics makes water different

The length of bonds connecting water molecules could demonstrate quantum effects and help explain some of water’s weirdness.

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5:32pm, July 22, 2008

Heavy water is not just heavier. Swapping each H in H2O with a D — hydrogen’s isotope deuterium — changes many of water’s properties. Heavy water is poisonous, and its freezing point is 4° Celsius, instead of 0°. Those differences may reveal that quantum effects rule in ordinary water, researchers have now found.

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