Question

Why is water never added to acid?

Answer 1

Hint: The acid in its pure form is very corrosive to other materials. Furthermore, pure acid is a dehydrator, meaning it will remove water from whatever thing it comes into contact with (except phosphorus pentoxide that dehydrates sulfuric acid to sulphur trioxide). It's also hygroscopic, meaning it can collect water vapour from the air quickly.

Complete answer:
The word exothermic process refers to a process or reaction in thermodynamics that transfers energy from a system to its surroundings, generally in the form of heat, but sometimes in the form of light (e.g., a spark, flame, or flash), electricity (e.g., a battery), or sound (e.g. explosion heard when burning hydrogen). An endothermic process absorbs energy, generally in the form of heat, and is the polar opposite of an exothermic process. In the physical sciences, the notion is commonly used for chemical processes in which chemical bond energy is transformed to thermal energy (heat).
Because a lot of heat is released during the acid-water interaction, it is an exothermic process. This heat causes some water to turn into steam, which can inflict acid burns if it splashes on our face or clothes. A process in which energy is emitted in the form of light or heat is known as an exothermic reaction. As a result, rather than extracting energy from the surroundings as in an endothermic reaction, energy is transferred into the surroundings in an exothermic reaction. The change in enthalpy in an exothermic process is negative.

Note:
The interaction between acid and water is extremely exothermic, meaning it generates a lot of heat. As a result, adding water to acid causes the solution to vigorously boil, and the amount of heat created is so great that it sprays the acid out of the container, causing acid burns.