During a steady$-$flow process, the total energy content of a control volume remains constant, and thus the change in the total energy of the control volume is zero. Therefore, the amount of energy entering a control volume in all forms $($by heat, work, and mass$)$ must be equal to the amount of energy leaving it$.$

When performing a general analytical study or solving a problem that involves an unknown heat or work interaction, we need to assume a direction for the heat or work Interactions.

Develop and define the:

Steady Flow Energy Equation from the very first principles

Properties involved in the constitution of this total energy.

Consider the mass balance for a general steady flow system, and your equation must be written and presented on a unit mass basis and rate form.