👉 An equilibrium fluid is a state of matter where the properties of the fluid, such as density, viscosity, and thermal conductivity, remain constant over time despite any changes in external conditions like temperature or pressure. In this state, the fluid's molecules are in constant motion, but their average kinetic energy is balanced by the intermolecular forces, leading to a stable configuration. This equilibrium can be maintained in various forms of fluids, including liquids and some gases under specific conditions. The fluid's properties are uniform throughout, making it a homogeneous mixture, and it can flow or remain static without changing its composition or structure.
