Question

Define heat and derive an expression for heat supplied to a body (Q =mst ).​

Answer 1

Definition of heat:

• Heat is a form of energy that has the capability to do work and can be transferred from one body to another.

Derivation of the above equation:

The amount of heat required to raise the temperature of the body depends upon two quantities:

• Mass of the object

• Temperature difference upon heat application

So, let heat required be Q :

$\sf 1)\: Q \propto m$

$\sf 2)\: Q \propto \Delta t$

Combining the two equations:

$\sf \therefore\: Q \propto (m \times \Delta t)$

$\sf \implies\: Q = m \times \: s \times \Delta t$

• Here "s" refers to specific heat capacity , it's a constant for a particular substance.

$\boxed{ \sf \implies\: Q = m s \Delta t}$

[Hence Derived]