Question

Define endothermic and exothermic with example

Answer 1

whenever energy is given to carry out reaction it is called endothermic and whenever energy is released during chemical reaction it is called exothermic

Answer 2

Endothermic Reaction:-
An endothermic reaction is any chemical reaction that absorbs heat from its environment. 
eg:-the reaction of barium hydroxide octahydrate crystals with dry ammonium chloride,dissolving ammonium chloride in water etc..

Exothermic Reaction:-
An exothermic reaction is any chemical reaction that produce heat.
eg:-making an anhydrous salt from a hydrate,forming a cation from an atom in the gas phase..etc..

Hope dis helps u...