6(a)
(i) How is the transference of heat energy by radiation prevented in a calorimeter?
(ii) You have a choice of three metals A, B and C, of specific heat capacities 900 Jkg-1°C-1, 380 Jkg-1°C-1 and 460 Jkg-1°C-1 respectively, to make a calorimeter. Which material will you select? Justify your answer.
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(i) To prevent heat transference by radiation, the outer and inner surfaces of calorimeter are polished.
(ii) For calorimeter, metal B will be used.
The reason is, it's specific heat capacity is lowest, so it will take least heat from its contents to acquire the temperature of contents.