Water Equivalent
المؤلف:
GEORGE A. HOADLEY
المصدر:
ESSENTIALS OF PHYSICS
الجزء والصفحة:
p-283
2025-11-25
48
It is evident that in all similar measurements, account should be taken of the change in temperature of the containing beaker, or calorimeter. In order to do this, it is necessary to find its water equivalent, or the mass of water that will require the same number of calories to raise its temperature one degree as the beaker requires. Numerically this is the product of the mass of the beaker by its specific heat.
EXAMPLE. - Copper shot weighing 500 grams at a temperature of 80° C. was poured into a 20 g. aluminum beaker containing 300 g. of water at 60° C. What was the resulting temperature? Water equivalent of beaker = 20 × 0.214 = 4.28. Hence,
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