Specific Heat
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-281
2025-11-25
43
Demonstration. - Place 50 g. of shot in one test tube and 50 g. of iron filings in another similar tube. Raise both to the same temperature by placing them in a beaker of hot water. Into each of two small beakers pour 100 g. of water that has been cooled to the zero point by means of ice. Pour the shot into one beaker and the filings into the other. Take the temperature of the water in each, and it will be found that the filings have given to the water the greater amount of heat, as is shown by the higher temperature in the beaker containing them.
This demonstration shows that iron has a greater amount of heat than lead at the same temperature. It follows that more heat would be needed to raise 50 g. of iron 1° in temperature than to raise 50 g. of lead 1°.
The ratio between the quantity of heat required to raise the temperature of a certain mass of any substance one degree, and the quantity of heat required to raise the same mass of water one degree, is the specific heat of that substance; or, the specific heat of a substance is the number of calories required to change the temperature of 1 g. of that substance 1° С.
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