Question

how many chemical reactions are there on the basis of the heat ???????..?​

Answer 1

Answer is

Exothermic and endothermic reactions

Explanation

On the Basis of heat the chemical reactions are of two types. i. e ,

• Exothermic reaction
• Endothermic reaction.

Exothermic reaction

• Exothermic = heat is producing. "Exo" is putted from greek language which means 'out' and "thermic" means heat. So , Exothermic reaction is a chemical reaction in which production of heat takes place in the form of heat or can be light.
• The general chemical reaction for exothermic reaction is given below ,
• Reactants ————›» Product + Energy ( Heat ).
• The amount of energy or heat released is given by ∆H.
• Example of exothermic reaction is nuclear fission.

Endothermic reaction

• Endo = absorbing , Thermic = Heat .
• So the Endothermic reaction is opposite of exothermic reaction i. e. Endothermic reaction = Heat absorbing reaction.
• So , Endothermic reaction is defined as the chemical reaction which requires energy in the form of heat to give products.
• General reaction → Reactants + Energy ( Heat ) —————›» Products.
• Example of endothermic reaction is Evaporation , Melting of ice.