Properties of Liquid | What are the properties of liquid

Properties of Liquid

The following properties of the liquid are important from the subject point of view:

1. Viscosity. It is also known as “absolute viscosity or dynamic viscosity. It is defined as the property of a liquid that offers resistance to the movement of one layer of liquid over another adjacent layer of liquid. The viscosity of a liquid is due to cohesion and interaction between particles.

2. Kinematic viscosity. It is defined as the ratio of dynamic viscosity to the density of the liquid.

3. Compressibility. It is that property of a liquid by virtue of which liquids undergo a change in volume with the change in pressure. Compressibility is the reciprocal of bulk modulus of elasticity, which is defined as the ratio of compressive stress to volumetric strain.

4. Surface tension. It is that property of a liquid that enables it to resist tensile stress. It is denoted by σ (sigma). It is expressed in N / m

5. Capillarity. It is defined as a phenomenon of rise or fall of a liquid surface in a small vertical tube held in a liquid relative to the general level of the liquid. The height of rise or fall (h) in the tube is given by

h = (4σ cos α)/(wd)

where,

σ= Surface tension,

α = Angle of contact of the liquid surface,

w = Specific weight of liquid, and

d = Diameter of the capillary tube.