Question

why acid is always hot but not cold​

Answer 1

because it is nature and moreover i t releases heat when it react with some material like water

so it is hot and not cold

Answer 2

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Answer:

A large amount of heat is released when strong acids are mixed with water. Adding more acid releases more heat. If you add water to acid, you form an extremely concentrated solution of acid initially. So much heat is released that the solution may boil very violently, splashing concentrated acid out of the container!

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