how is this react with water?
It causes a hydration reaction.
Sulfuric acid
Because the hydration reaction of sulfuric acid is highly exothermic, dilution should always be performed by adding the acid to the water rather than the water to the acid. Because the reaction is in an equilibrium that favors the rapid protonation of water, addition of acid to the water ensures that the "acid" is the limiting reagent. This reaction is best thought of as the formation of hydronium ions:

Because the hydration of sulfuric acid is thermodynamically favorable and the affinity of it for water is sufficiently strong, sulfuric acid is an excellent dehydrating agent. Concentrated sulfuric acid has a very powerful dehydrating property, removing water (HO) from other chemical compounds including sugar and other carbohydrates and producing carbon, heat, and steam.
most common cause of death in burn patients Infections being the most common  pneumonia, cellulitis, urinary tract infections and respiratory failure. what is burn? A burn is a type of injury to skin, or other tissues, caused by heat, cold, electricity, chemicals, friction, or radiation. what are the indications? Severe burns may indicate discomfort or complain of feeling pressure rather than pain, there are superficial burns, full-thickness burns. how is it caused by chemical? Chemicals like strong base or a strong acid can cause deep burns. can you name such chemicals? Sulfuric acid, sodium hypochlorite, halogenated hydrocarbons, hydrofluoric acid, formic acid. what type of acid is the first one? It is a mineral acid composed of the elements sulfur, oxygen and hydrogen, with molecular formula HSO.
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Sulfuric acid [SEP] Reaction with water and dehydrating property
Because the hydration reaction of sulfuric acid is highly exothermic, dilution should always be performed by adding the acid to the water rather than the water to the acid. Because the reaction is in an equilibrium that favors the rapid protonation of water, addition of acid to the water ensures that the "acid" is the limiting reagent. This reaction is best thought of as the formation of hydronium ions: Because the hydration of sulfuric acid is thermodynamically favorable and the affinity of it for water is sufficiently strong, sulfuric acid is an excellent dehydrating agent. Concentrated sulfuric acid has a very powerful dehydrating property, removing water (HO) from other chemical compounds including sugar and other carbohydrates and producing carbon, heat, and steam.