What is Endothermic Reaction?

Endothermic reaction: Endothermic reaction is the reaction where heat energy absorbed.

CaCO3 (s) →∆→ CaO (s) + CO2 (g) ∆H298K = + 178 Kj mol-1.

In endothermic reaction the value of ∆H is positive.


Some Common Examples of Endothermic Reaction:

  • melting ice cubes
  • conversion of frost to water vapor
  • evaporation of water
  • forming a cation from an atom in the gas phase
  • baking bread
  • producing sugar by photosynthesis
  • separating ion pairs