Liquides
Liquids are a state of matter defined by a definite volume but no fixed shape; they flow to fill the lower part of their container and take the container's shape. The molecules in a liquid are less tightly bound than in a solid, allowing diffusion and deformation under stress. Liquids are almost incompressible under ordinary pressures, and their movement is described by hydrodynamics.
Important properties include density, viscosity, surface tension, boiling point, freezing point, vapor pressure, and refractive index.
Liquids can be classified by composition as pure liquids or mixtures (solutions or suspensions). They can also
In nature and technology, liquids serve as solvents, reactants, heat-transfer media, lubricants, and coolants. Water is
Measuring liquids involves standard units of density (g/cm3 or kg/L), dynamic viscosity (Pascal-second), surface tension (N/m),