Question

endothermic reaction definition

Answer 1

in a reaction if heat is absorbed then it is called as endothermic reaction
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during the endothermic reaction the experimental setup or the test tube becomes cold then we can say that it is an endothermic reaction
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the sign convention for endothermic reaction is positive

Answer 2

Hey!!
Here is your answer..

Q.)What is Endothermic reaction ?


The chemical reactions in which the heat is absorbed from outside is called as Endothermic reaction.
During this reaction,
Heat is either absorbed from the surrounding or has to be supplied continuously from outside.

For example..

CaCo3 + heat => CaO + CO2 
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