Why is photosynthesis considered an endothermic reaction ?

It is an endothermic reaction because in this plants use energy to change CO₂ and water into glucose and O_2.

6CO₂+H₂O-------> C₆H₁₂O_{6 +} 6CO₂

here photolysis takes plase energy is required in form fo light or heat

 

to carry out the reaction of photosynthesis

Photosysnthesis is considered an endothermic reaction because heat energy is absorbed.

Photosysnthesis is called an endothermic reaction because heat is taken in.

Photosynthesis is an endothermic reaction as energy(sunlight) is used by the green plants to break the water molecule into H+ and O-2 ions.It also includes reduction of atmospheric CO2 into carbohydrates(glucose).