:
the attractive force exerted upon the surface molecules of a liquid by the molecules beneath that tends to draw the surface molecules into the bulk of the liquid
and makes the liquid assume the shape having the least surface area.
What is surface tension simple definition?
Surface tension could be defined as
the property of the surface of a liquid that allows it to resist an external force
, due to the cohesive nature of the water molecules.
What is surface tension in chemistry?
Surface tension is
the energy, or work, required to increase the surface area of a liquid due to intermolecular forces
. Since these intermolecular forces vary depending on the nature of the liquid (e.g. water vs. … Water droplets form on the surface of the water pool because of surface tension.
What is surface tension in chemistry for kids?
Surface tension is a
force which causes a layer of liquid to behave
like an elastic sheet or skin. It is the high surface tension of water which allows insects to walk over it. … It is this skin ( surface tension ) that stops items on the surface sinking.
What is surface tension and its SI unit?
Surface tension (denoted with the Greek variable gamma) is defined as the ratio of the surface force F to the length d along which the force acts: Surface tension is measured in SI units of
N/m (newton per meter)
, although the more common unit is the cgs unit dyn/cm (dyne per centimeter).
What liquids have surface tension?
There is only one liquid having higher surface tension and that’s
mercury
which is a liquid metal with a surface tension of almost 500 mN/m.
What is the aim of surface tension?
Surface tension is
responsible for the curvature of the surfaces of air and liquids
. Surface tension is responsible for the ability of some solid objects to “float” on the surface of a liquid. Surface tension is responsible for the shape of the interface between two immiscible liquids.
What is surface tension and example?
surface tension,
property of a liquid surface displayed by its acting as if it were a stretched elastic membrane
. This phenomenon can be observed in the nearly spherical shape of small drops of liquids and of soap bubbles. … The razor blade is not floating: if pushed through the surface, it sinks through the water.
Is surface tension a force?
In fluid mechanics, the surface tension is not defined in terms of a surface energy but
rather as a force per unit length
. In the bulk of a fluid at rest, two sub-parts of a fluid exert a repulsive force on one another, which is called the pressure.
How do you explain surface tension?
Surface tension is
the tendency of liquid surfaces at rest to shrink into the minimum surface area possible
. Surface tension is what allows objects with a higher density than water such as razor blades and insects (e.g. water striders) to float on a water surface without becoming even partly submerged.
What is the difference between surface tension and surface energy?
The main difference between surface tension and surface energy is that
surface tension measures the force per unit length of the surface
while surface energy measures the amount of work that needs to be done per unit area in order to stretch it.
How do you find surface tension?
Surface tension is given by the
equation S = (ρhga/2)
where S is the surface tension, ρ (or rho) is the density of the liquid you are measuring, h is the height the liquid rises in the tube, g is the acceleration due to gravity acting on the liquid (9.8 m/s
2
) and a is the radius of the capillary tube.
What is the SI unit of viscosity?
Dynamic viscosity: The SI physical unit of dynamic viscosity (μ) is
the Pascal-second (Pa s)
, which is identical to 1 kg m
− 1
s
− 1
. The physical unit for dynamic viscosity in the centimeter gram second system of units (cgs) is the poise (P), named after Jean Poiseuille.
What has the highest viscosity?
From the given compounds
C2H5OH
will have the highest viscosity. Viscosity is a function of the strength of the intermolecular forces in a molecule….
What is called viscosity?
Viscosity is
a measure of a fluid’s resistance to flow
.
It describes the internal friction of a moving fluid. A fluidwith large viscosity resists motion because its molecular makeup gives it a lot of internal friction.
