It is the key branch of both chemistry and physics in which the study of relation between heat, temperature and other forms of energy in a system are discussed.
It gives the description of the only large-scale body (macroscopic bodies).
Scope of thermodynamics:
It is used in a vast range of science and engineering streams such as:
Under a given set of temperature, pressure, and concentration conditions, it shows whether a particular physical or chemical change is possible.
It also supports forecasting how far a physical or chemical change can proceed before reaching equilibrium situations.
The typical use of thermodynamics can be seen by civil engineers to determine how much heat goes inside a house through the winter in summer or how much shielding a house requires in winters.