Calcium oxide (lime) reacts with carbon dioxide to form calcium carbonate (chalk). CaO(s) + CO2(g) ? CaCO3(s) ?H = -178.4 kJ
(a) Is this reaction exothermic or endothermic?
(b) How many kilojoues of heat are evolved in the reaction of 350.0 g of CaO(s) with an excess of carbon dioxide?
(c) How many grams of CaCO3(s) are produced during an enthalpy change of -452.5 kJ?