Heat is the form of energy that gives out the body the feeling of hotness within a particular time, which will influence out the environment leading to high temperature.

The Heat formula is given as,
H = C$_{p}$ $\times$ m $\times$ $\Delta$ T.
Where,
H is heat energy,
m is the mass,
C$_{p}$ is specific heat,
$\Delta$ T is a temperature difference.

The SI unit of heat is expressed in Joules (J).

Below are given some problems on heat you can go through:

Question 1: Annie was busy in performing a chemistry experiment where she raised the temperature of water to 67$^{\circ}$C from room temperature (27$^{\circ}$C). How much will be the heat released if the mass of water is 923 grams.
Solution:
Given:
Temperature difference $\Delta$ T = 67$^{\circ}$C - 27$^{\circ}$C = 40$^{\circ}$C,
mass m = 923 grams,
specific heat C$_{p}$ = 4.184 J.

The heat released is given by,
H = C$_{p}$ $\times$ m $\times$ $\Delta$ T
H = 4.814 J $\times$ 923 g $\times$ 400C
H = 154,473 J

Therefore, 154,473 J of heat is released.
 
Question 2: Calculate the heat required to raise 1 kg of iron from 32$^{\circ}$ C to 50$^{\circ}$ C.
Solution:
Given:
Temperature difference $\Delta$ T = 50$^{\circ}$C - 32$^{\circ}$C = 18$^{\circ}$C,
mass m = 1000 grams,
specific heat C$_{p}$ = 4.184 J.

The heat released is given by,
H = C$_{p}$ $\times$ m $\times$ $\Delta$ T
H = 4.814 J $\times$ 1000 g $\times$ 18$^{\circ}$C
H = 75312 J.

Therefore, 75312 J of heat is released.