If specific heat capacity of a substance in solid and liquid state is proportional to the absolute temperature (Kelvin) of the substance, then if heat is supplied to the solid initially at − 2 0 ∘ C (

Question

If specific heat capacity of a substance in solid and liquid state is proportional to the absolute temperature (Kelvin) of the substance, then if heat is supplied to the solid initially at − 2 0 ∘ C (having melting point 0 ∘ C ) at constant rate. Then the temperature dependence of solid with time will be best represented by:

TestHub · Accepted Answer

Heat is supplied at a constant rate: d t d Q ​ = m s d t d T ​ Increasing specific heat makes the temperature rise progressively slower. s ↑ ⇒ d t d T ​ ↓ So the curve gets flatter as the solid warms, stays flat during melting, then rises again with decreasing slope. This is graph (B).

Physics - Heat & Thermo Question with Solution | TestHub

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