Question

Heat energy required to raise the temperature of a body of mass $m$ in kg by $\Delta tk$ is

• A. $\frac{mc}{\Delta t}Joule$
• B. $\frac{m\Delta t}{c}Joule$
• C. $\frac{c}{m\Delta t}J$
• D. $mc\Delta t$

Answer 1

The correct option is D $mc\Delta t$

It is found that , heat required to raise the temperature of a body of mass $m$ through $\Delta tK$ is ,

$\Delta Q\propto m$ ,

and $\Delta Q\propto \Delta t$

combining these two factors ,

$\Delta Q\propto m\Delta t$ ,

or $\Delta Q=cm\Delta t$ ,

where proportionality constant $c$ is called specific heat of body .