Question

exothermic reaction in which heat is evolved​

Answer 1

Answer:

sodium when reacts with water it gives sodium hydroxide with lots of heat as a bi product

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Answer 2

Answer:

Explanation:

Exothermic reactions are reactions that release energy into the environment in the form of heat. Exothermic reactions feel warm or hot or may even be explosive.

More energy is released making chemical bonds than is used breaking them. In an exothermic reaction, the enthalpy change has a negative value: ΔH < 0

Terms Related To Exothermic Reaction

Exergonic Reaction – A reaction that releases energy in any form (e.g., light, sound, heat). An exothermic reaction is a type of exergonic reaction.

Endothermic Reaction – An endothermic reaction is the opposite of an exothermic reaction. Heat is absorbed in an endothermic reaction. In an exothermic reaction, the enthalpy change has a positive value: ΔH > 0

Exothermic reactions may be written as chemical reactions. Exothermic processes may be written in reaction format, but are more general and often include a combination of chemical reactions or involve nuclear reactions. Here are examples of exothermic reactions and processes:

Examples of Exothermic Reactions

• any combustion reaction

• a neutralization reaction

• rusting of iron (rust steel wool with vinegar)

• the thermite reaction

• reaction between water and calcium chloride

• reaction between sodium sulfite and bleach (dilute sodium hypochlorite)

• reaction between sodium and chlorine to make sodium chloride (table salt)

• reaction between water and any strong acid

• reaction between water and any anhydrous salt

• dissolving laundry detergent in water

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