Question

what are exothermic and endothermic reactions give example also?​

Answer 1

Answer:

the reactions in which energy is required are called endothermic reaction

ex-CaCo3 + heat -----> CaO +CO2

Explanation:

the reactions in which energy is evolved either in the form of heat is known as exothermic reaction

ex-CaO(s)+H20 (l)------>Ca(OH)2 (aq)+energy

Answer 2

Answer:

exothermic reaction: heat is released along with the formation of products in chemical reactions

eg: 1. all combustion reactions are exothermic.

2. mixing water with quick lime(CaO) to form slaked lime [Ca(OH)2]

3. respiration

(all combination reactions)

endothermic reaction: chemical reaction in which heat is absorbed

eg: 1. photosynthesis

2. manufacturing of Cement- heating calcium carbonate to form calcium oxide and carbon dioxide

(all decomposition reactions)