Mechanical Engineering is an engineering discipline which work with principles of physics for analysis, design, manufacturing, and maintenance of mechanical systems. It requires a solid understanding of core concepts including mechanics, kinematics, thermodynamics, fluid mechanics, and energy.
In chemical engineering they deals with the application of physical science (e.g. chemistry and physics), with mathematics, to the process of converting raw materials or chemicals into more useful or valuable forms.
In both feilds same subjects are offered such as thermodynamics, fluides. But these subjects are used in very different objectives and scope.