Physics
(a) Give an important reason for copper to be used as a material for a calorimeter.
(b) Calculate the thermal capacity of 40 g of water.
[Specific heat capacity of water = 4200 JKg-1°C-1]
Calorimetry
ICSE 2022
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Answer
(a) The reasons for using copper is that it has low specific heat capacity so the heat capacity of calorimeter is low and the amount of heat energy taken by the calorimeter from the contents to acquire it's temperature, is very small.
(b) Thermal capacity = specific heat capacity x amount of substance
∴ Thermal capacity of 40 g water = 4200 x = 168 J° C-1
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