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ICSE Class 10 Physics Question 3 of 15

Solved 2022 Semester 2 Question Paper ICSE Class 10 Physics — Question 2

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2
Question

Question 2(ii)

(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]

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 401000\dfrac{40}{1000} = 168 J° C-1