Thermodynamics, as a sub-branch of physics, refers to the study of the interrelation between energy, work, heat and temperature. It is based on the four major laws of thermodynamics and is divided into four major parts, namely, chemical thermodynamics, classical thermodynamics, equilibrium treatment and statistical mechanism. The topics covered in this text offer the readers new insights in the field of thermodynamics. Different approaches, evaluations and methodologies have been included in it. This textbook is an essential guide for both academicians and those who wish to pursue this discipline further.