(b)Name the material of which it is made of. Give two reasons for using the material stated by you.

(c) Out of the three metals A, B and C of specific heat 900 J kg^-1 °C^-1, 380 J kg^-1 °C-1 and 460 J kg^-1 °C^-1 respectively, which will you prefer for calorimeter? Given reason.

(d) How is the loss of heat due to radiation minimised in a calorimeter?

Solution:

(a) A calorimeter is a cylindrical vessel that is used to measure the amount of heat acquired or lost by a body when it is mixed with another body.

(b) It is made of a thin sheet of copper because

(i) copper conducts heat well, allowing the vessel to quickly acquire the temperature of its contents.
(ii) Because copper has a low specific heat capacity, the calorimeter’s heat capacity is low, and the amount of heat energy taken from the contents to obtain its temperature is very little.

(c) The calorimeter’s heat capacity should be reduced. As a result, the metal with the lowest specific heat capacity should be chosen out of the three.

(d) In a calorimeter, heat loss due to radiation can be reduced by polishing the vessel’s exterior and inner surfaces.