Question

The quantity of heat required to raise the temperature of unit mass of a substance through one degree Celsius is known as

• A. Heat Capacity of body
• B. Specific heat capacity of a body
• C. Latent heat of body
• D. Specific latent heat of a body

Answer 1

The correct option is B Specific heat capacity of a body

If by supplying a heat of $Q$ to a substance of mass $m$, its temperature increases by $\Delta t$, then

$Q\propto m\Delta t$

or $Q=cm\Delta t$

where $c=$ constant of proportionality , called specific heat capacity of the body.

Now, if $m=1,\Delta t=1^{o}C$ ,

then, $Q=c$

therefore, specific heat is the heat required to raise the temperature of unit mass of substance by one degree Celsius.