The decomposition of calcium carbonate at

800 C is carried out with air enriched in excess at

500 C. The theoretical requirement is 0.0067 kg of C/Kg CaCO3, it determines if there is a gain or loss of heat in the reaction zone, the excess of oxygen is 25%.

This are the reactions:

CaC03-->CaO+CO2

C+02-->002

Calculate concentrations in mol by performing stoichiometric balances, and the base of calculus is 10 mol of CaCO3.