Four rods, each of same initial length but made of copper, glass, iron and aluminium are heated to the same rise in temperature. Which rod will expand more?

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Solution

Specific heat of Copper is $0.385 J / g^{o} C$
Specific heat of Aluminium is $0.902 J / g^{o} C$
Specific heat of glass is $0.84 J / g^{o} C$
Specific heat of iron is $0.450 J / g^{o} C$

Since the aluminum rod has the highest specific heat.

Hence, it will absorb more heat and as a result, will expand more as compared to other materials.

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