Heat & Temperature

The energy of the particles is effectively their internal energy. 
This internal energy is the amount of heat (Q) contained by the substance. 
Because the particles of matter are in motion, they all posses Kinetic Energy.
recall Kinetic Energy can be calculated using the equation
E= mv2/2
Since kinetic energy depends on speed, the faster the motion of the particles, the higher their heat content. 
The speed of the particle is a measure of the object's temperature. 
 he bigger the object the higher its heat content.
This means that the heat content of an object depends ion its mass (m) as well as its temperature change DT
Mathematically therefore e can express the heat content of a substance using the equation
 Q = m x c x DT