Question

The quantity required to increase the temperature of a body by $1 Kelvin$ is called:
(A) Thermal capacity
(B) Water equivalent
(C) Remain the same
(D) Molar specific heat

Answer 1

Hint: From the question we know that the quantity we are required to find is the amount of heat required to increase the temperature of the body by . And this is thermal heat capacity about which we will discuss in detail.

Complete step by step solution:
Thermal capacity is an extensive property of the system. It is defined as the amount of heat energy required to increase the temperature of a body by a unit value, that is $1^\circ k$. It is also known as the heat capacity of matter. The SI units for thermal capacity is joule per kelvin $(Joules/K)$.
Thermal heat capacity = $m \times c$ , $m$= mass, $c$= specific heat capacity ($c = \dfrac{Q}{{m\vartriangle T}}$), where $\vartriangle T$ is the temperature change and Q is the heat supplied.

Hence , option (A), Thermal capacity is the correct answer.

Additional information: An intensive property is a bulk property, meaning that it is a local physical property of a system that does not depend on the system size or the amount of material in the system.

Note: Remember, the c in the formula for calculating thermal heat capacity is specific heat capacity. Specific heat capacity is an intensive property of a system. It is the heat required to change the unit temperature of unit mass. It does not depend on the mass of the substance, it is always constant for a particular substance. Heat capacity and specific heat capacity are two different quantities that do not get confused while using specific heat in the calculations for Thermal capacity. We can check for unit consistency in the formula for thermal capacity, units for thermal capacity is $Joules$ and for mass and specific heat capacity are $Kg, Joule/Kg$ respectively. Now multiplying both the units on the right-hand side we get $Joules$, LHS=RHS.