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.
What is a simple definition of surface tension?
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 the definition of surface tension in chemistry?
: 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 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.
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 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 give two examples?
Examples of Surface Tension
Insects walking on water . Floating a needle on the surface of the water . ... Washing with cold water. Round bubbles where the surface tension of water provides the wall tension for the formation of water bubbles. This phenomenon is also responsible for the shape of liquid droplets.
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 is the principle of surface tension?
According to this theory, cohesive forces among liquid molecules are responsible for the phenomenon of surface tension. The molecules well inside the liquid are attracted equally in all directions by the other molecules. ... So, a network is formed against the inward pull, in order to move a molecule to the liquid surface.
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.
What are the factors on which surface tension depends?
Hint: Surface tension is the property of liquid caused by the imbalance of molecular forces at the surface of the liquid. Factors causing the change in molecular forces also affect the surface tension. The value of surface tension depends on the nature of the liquid, surrounding environment and purity of the liquid .
