Second option is the correct answer I believe
Answer:
Explanation:
(i) Image
(ii) The energy of the products is more than that of the reactants, which shows that energy was absorbed. Hence, the reaction is endothermic.
I believe the answer is B.
Hope this helps
B. Chemical energy to start a chemical reaction
Answer: The chemical equation for the formation one mole of
from its elements in their standard states is ![Ca(s)+C(s)+\frac{3}{2}O_2(g)\rightarrow CaCO_3(s)](https://tex.z-dn.net/?f=Ca%28s%29%2BC%28s%29%2B%5Cfrac%7B3%7D%7B2%7DO_2%28g%29%5Crightarrow%20CaCO_3%28s%29)
Explanation:
The standard enthalpy of formation or standard heat of formation of a compound is the change of enthalpy during the formation of 1 mole of the substance from its constituent elements, with all substances in their standard states.
The chemical equation for the formation one mole of
from its elements in their standard states is:
![Ca(s)+C(s)+\frac{3}{2}O_2(g)\rightarrow CaCO_3(s)](https://tex.z-dn.net/?f=Ca%28s%29%2BC%28s%29%2B%5Cfrac%7B3%7D%7B2%7DO_2%28g%29%5Crightarrow%20CaCO_3%28s%29)
where (s) represents solid state and (g) represents gaseous state.