Question

The value of specific heat depends on
(A) Nature of the material
(B) Amount of work done externally due to expansion of the substance caused by raising the temperature
(C) Both A and B
(D) None of these

Answer 1

Hint: We know that the specific heat capacity is a measure of the amount of heat energy required to change the temperature of 1 kg of a material by 1 K. Hence it is important as it will give an indication of how much energy will be required to heat or cool an object of a given mass by a given amount. Water has the highest specific heat capacity of any liquid. Specific heat is defined as the amount of heat one gram of a substance must absorb or lose to change its temperature by one degree Celsius. For water, this amount is one calorie, or 4.184 Joules. Based on this concept we have to answer this question.

Complete step-by step answer:
As the specific heat varies depending on the nature if material like water has different specific material than copper. So, the value of specific heat depends on the nature of the material.
Similarly, it depends on the amount of work done externally due to expansion of the substance caused by raising the temperature.
Therefore, we can conclude that the value of specific heat depends on the nature of the material and amount of work done externally due to expansion of the substance caused by raising the temperature.

Hence, the correct answer is Option C.

Note: For the better understanding we should know that the molar heat capacity is a measure of the amount of heat necessary to raise the temperature of one mole of a pure substance by one degree K. Specific heat capacity is a measure of the amount of heat necessary to raise the temperature of one gram of a pure substance by one degree K. Heat capacity always has a positive value. It is the amount of energy (heat) required to raise the temperature of the system. When talking about the specific heat capacity of solids.
It is also required to know that the specific latent heat of a substance is the amount of energy needed to change the state of 1 kg of the substance without changing its temperature. Each substance has two specific latent heats latent heat of fusion or the amount of energy needed to freeze or melt the substance at its melting point.