Specific heat of copper in the interval 0° and 50°, with a note on vacuum-jacketed calorimeters

Specific heat of copper in the interval 0° and 50°, with a note on vacuum-jacketed calorimeters

Year: 1915

The specific heat of chemically pure copper between 0 degrees and 50 degrees C. has been redetermined with precision on account of its importance in some determinations of the mechanical equivalent of heat which are being undertaken, the thermal capacity of the copper in these experiments amounting to 1 or 2 % of the whole. A new method is adopted in which 50 m, of copper, wire 2.5 mm. in diam. serves the fourfold function of being the test specimen, the calorimeter itself, the heater, and the thermometer. The wire in the form of a non-inductive coil is suspended in a vacuum and heated with a measured quantity of energy supplied electrically, the%2