Question

Consider the following statements.
$1.$ Specific heat capacity is the amount of heat required to raise the temperature of $1kg$ of a substance through $1$ kelvin.
$2.$ The SI unit of specific heat capacity is $Jk{g}^{-1}{K}^{-1}$ and in CGS it is $cal{g}^{-1}{}^{\circ }{C}^{-1}$.
$3.$ Thermal capacity is the amount of heat required to raise the temperature of a given amount of substance through $1$ kelvin.
Which of the statements given above are correct?

• A. $1$ and $2$
• B. $2$ and $3$
• C. $1$ and $3$
• D. $1,2$ and $3$

Answer 1

The correct option is D $1,2$ and $3$

1. Specific heat capacity(c) is given as, $Q=mc\Delta T$, i.e. amount of heat required to raise the temperature of unit mass of a substance through unit degree temperature change.

2. By above equation, SI unit of Specific heat capacity is $Jk{g}^{-1}{K}^{-1}$ and CGS unit is $cal{g}^{-1}{}^o{C}^{-1}$

3. Thermal capacity (C) is given as, $Q=C\Delta T$ which is the amount of heat required to raise the temperature of a given amount of substance through unit degree temperature change.

So all the statements are correct.