ISSN:
1572-8943
Keywords:
electrorefining
;
‘excess heat’
;
general thermodynamics
;
irreversibility
;
microcalorimetry
Source:
Springer Online Journal Archives 1860-2000
Topics:
Chemistry and Pharmacology
Notes:
Abstract Calorimetric measurements were carried out on the electrorefining of copper using different current densities with a Calvet type microcalorimeter at room temperature. The ratio (R) of the measured heat (Q m orW m) to the input electric energy (Q in orW in) and the excess heat (Q ex orW ex), i.e. the difference betweenQ m (orW m) andQ in (orW in) during the electrorefining process were discussed in terms of general thermodynamics. It was found thatR andQ ex were related to the current density employed in the experiment and varied as a logarithmic function. The results obtained here 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 by some unknown processes.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01979552
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