Find the ΔHr0 for the reaction of one mole of solid magnesium carbonate that decomposes into one mole of solid magnesium oxide and one mole of carbon dioxide gas.

MgCO3(s)→MgO(s) + CO2(g)

Answer choice:
A.)ΔHr0= -45.3kJ
B.)ΔHr0= +105.8kJ
C.)ΔHr0= +125.7kJ
D.)ΔHr0= +117.0kJ
E.)ΔHr0= -140.0kJ

oxygen, selenium, tellurium, and polonium.

they're all from the same group as sulfur (group 16).

a. energy is absorbed in the reaction.

if in a given reaction the energy of products is greater than the energy of reactants it means that reaction is endothermic and during the reaction, the energy is absorbed by reactants. in an endothermic reaction, the products have more stored chemical energy than the reactants. and in this reaction the reactants are more stable than products before the compounds with less energy are always more stable.