The isobaric molar heat capacities o f nano Co 2 O 3 were determined by an adiabatic calo rimeter in the temper-ature range from 78to 350K.No phase t ransition takes place in this temperature range.The relationship of C p,m with respect to thermodynamic temperature T was established as C p,m =-11.998X 3 -9.6431X 2 +63.478X+81.291(J·K -1 ·mol -1 ),where X=(T-201.903)/121.535,the correlation coefficient R 2 =0.9996.Ac-cording to this relationship and the relationships between thermodynam ic functions,the thermodynamic functions of nano Co 2 O 3 relative to the standard temperatur e of 298.15K were derived based on the measured heat capacity data.The average grain size of the studied nano Co 2 O 3 sample was determined to be 12nm by TE M.
The bacterial growth thermogram curves under different acidities were determined.Fromthese thermogram curves, the growth rate constants(k) at different acidities were calculated andthe equation correlating of k with PH could be established.ftom these k-pH equations,the optimum acidity of bacteria growth could be obtained. These models provide a good method for thestudy of the metabolism of bacteria.
