Define endothermic reaction . Give an example .

Explanation

A reaction in which heat is either absorbed from the surrounding or has to be supplied continuously from outside is called as endothermic reaction.
(ii) e.g. melting of ice, dissolution of potassium nitrate in water . During to process of dissolution of potassium nitrate `(KNO_(3))` in water, heat from the surroundings is absorbed and therefore, the temperature of the resulting solution is less.
(iii) The process in which heat is absorbed from outside is called endothermic process.
`{:(KNO_(3(s))+H_(2)O_((I))+"Heat" to KNO_(3(aq))),(" Potasium" " ""Water" " ""Potassium nitrate" ),(" ""nitrate" " ""solution"):}`