Exothermic is when energy is released
endothermic is when its being absorbed<span />
The empirical formula : C₁₁O₁₄O₃
<h3>Further explanation</h3>
The assumption of the compound consists of C, H, and O
mass of C in CO₂ =

mass of H in H₂O =

mass of O :
mass sample-(mass C + mass H)

mol of C :

mol of H :

mol of O :

divide by 0.0155(the lowest ratio)
C : H : O ⇒

I believe the correct answer is the geoshpere. I hope this was helpful.
It is an exothermic reaction because the heat is released.