Definition of Thermodynamics
Thermodynamics is a branch of physics which deals with the study of the relationship of heat energy with other forms of energy. It helps us in understanding the concept that how the matter is affected by thermal energy and how this is converted into other forms of energy and vice versa. Thermodynamics is linked directly to heat as heat energy remains conserved in all cases i.e. it can neither be created nor be destroyed.
Heat energy is transferred from one place to another. Moreover, the amount of heat depends on the number of atoms and their motion. If the atoms are moving very fast, then the temperature of the system rises. In the same way, if the quantity of atoms in a system is great, the temperature will be high.