HOT ICE

Sodium acetate is also used in consumer heating pads or hand warmers and is also used in “hot ice”. When sodium acetate trihydrate crystals (melting point 58 °C) are heated to around 100 °C, they melt. When this melt cools, it gives a supersaturated solution of sodium acetate in water. This solution is capable of supercooling to room temperature, well below its melting point, without forming crystals. By clicking on a metal disc in the heating pad, a nucleation center is formed which causes the solution to crystallize into solid sodium acetate trihydrate again. The bond-forming process of crystallization is exothermic, hence heat is emitted. The latent heat of fusion is about 264–289 kJ/kg (Source).

Is water is more acidic than ROH

yes water is more acidic than ROH becoz HO- is more stable than RO-

when nitrobenzaldehyde and methoxy benzaldehyde react together cannizaro reaction take place methoxy benzaldehyde give acid and other give alcohol