The kinetic parameters needed to describe the decomposition of calcium carbonate are obtained by a method which avoids the direct use of the Arrhenius parameters, the preexponential term A and the energy of activation E, It is shown that the approach is amenable to both an exact differential and integral analysis which carries certain advantages over existing methods. If needed, the method can be extended to allow the calculation of the Arrhenius parameters A and E, and in addition will show any dependence of E upon the fraction decomposed alpha, although it might be argued that the dependence of E is really upon the temperature.