Thermokinetic studies of the process for electrorefining silver

In this work some calorimetric measurements were also carried out on the el ectrorefining silver by using different current densities with a Calvet typ e microcalorimeter at room temperature. The ratio (R) of the measured heat (Q(m)) to the input electric energy (Q(in)) and the excess heat (Q(ex)), i. e., difference between Q(m) and Q(in) during the electrorefining process, w ere discussed in terms of general thermodynamics. It was found that the R a nd Q(ex) for silver were related with the current density or cell voltage e mployed in the experiment. The results obtained here also indicate that the heat generation under different conditions, such as different currents or voltages may be caused partially by the irreversibility of the process or b y some unknown processes.