Abstract
A decomposition study of γ-irradiated (0.2 MGy) La2 (C2O4)3 + CuO (10 mol%) mixture has been carried out at 380–540 °C, using a rising temperature technique in air. The results are compared with those of the unirradiated sample in order to explore the simultaneous effect of γ-irradiation and admixture on the decomposition of lanthanum oxalate. Considering the data in the light of theories of different kinetic models, they are found to fit best to a third-order rate law. Though both the treatments increase the energy of activation, the admixture enhances the rate constant appreciably, but only a marginal effect is observed in the case of irradiation. The rate constant, k and energy of activation, E follow the order: and respectively. A kinetic compensation law with a kinetic model function, g(α) is established for four sets of reaction.
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