Question

Calorimeters are generally made up of
A.Copper
B.Brass
C.Aluminium
D.Zinc

Answer 1

Hint: Calorimeter is a device that is used to measure heat transferred by a substance so it should be made of a material that has low heat absorption and emission rate.

Complete step by step answer:
Calorimeter is a device used to determine specific heat of a substance. Since copper is a good conductor of heat and has a very low specific heat capacity. it is the most suited material for making calorimeters. Due to its low specific heat capacity it readily reaches the equilibrium temperature by absorbing heat.
Copper is also highly malleable so a container with thin walls can be easily made, this would also ensure that the heat absorbed or released by the calorimeter itself is negligible.
The correct answer is A. copper.

Additional information:
The method for determining specific heat capacity or latent heat of a substance using a calorimeter is called calorimetry. It uses the method of mixtures. The substance whose specific heat is to be determined is mixed with water and the individual heat gain by water and calorimeter is equated to heat lost by the substance.

According to the principle of calorimetry,
Heat gained= heat lost
$\begin{aligned} & s{{m}_{2}}({{t}_{2}}-t)=({{m}_{1}}+w)(t-{{t}_{1}}) \\\ & s=\dfrac{({{m}_{1}}+w)(t-{{t}_{1}})}{{{m}_{2}}({{t}_{2}}-t)} \\\ \end{aligned}$
Here, $s=$specific heat of the substance
$w$=water equivalent of calorimeter
${{t}_{1}}$=initial temperature of water and calorimeter
${{t}_{2}}$= temperature of substance
$t$= temperature of the mixture
${{m}_{1}}$= mass of water
${{m}_{2}}$= mass of substance

Note: Brass, aluminium and zinc have comparatively low heat conductivity and higher specific heat capacity therefore they are not suitable material for calorimeter.