Blue Vitriol: phase transitions

The snow is melting. Its white symmetry is beaking. Water’s obedience to gravity is restored. I placed a Petri dish containing anhydrous (lacking water) Copper Sulphate under dripping snow. With the lid on at first, but when this was removed the metronomic note of the freed water is replaced by heat and hissing. The water is being absorbed into the Copper Sulphate to form its blue hydrated form (Blue Vitriol) in an exothermic (heat releasing) reaction and again returned to an immobile crystalline form.

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