Substance | CaCO₃(s) CaO(s) CO₂(g)
ΔH° (kJ/mol) | -1210 2640 -390
CaCO₃ decomposes according to the balanced equation CaCO₃(s) → CaO(s) + CO₂(g). Based on the standard enthalpies of formation provided in the table above, what is the approximate enthalpy change of the reaction?
a) 180 kJ
b) +180 kJ
c) -1460 kJ
d) +1460 kJ
