What does viscosity of liquid depend on? The viscosity of a liquid usually depends on
its temperature
. Viscosity generally decreases as the temperature increases. Viscosity generally increases as the temperature decreases. The viscosity of a liquid is related to the ease with which the molecules can move with respect to one another.
Is viscosity dependent on temperature?
Viscosity depends strongly on temperature
. In liquids it usually decreases with increasing temperature, whereas, in most gases, viscosity increases with increasing temperature.
How does viscosity depend on pressure?
Solution : Viscosity of liquids decreases with increase of temperature.
In case of water, viscosity decreases with increase of pressure
. But in other liquids, viscosity increases with increase of pressure.
What are the main factors that affect the viscosity of liquids and gases?
The main factors that affect viscosity of fluids are
the size and shape of the particles and the temperature
.
Does weight affect viscosity?
A High molecular weight increases the chemical resistance – to a point. It takes more damage to the main chains of the molecules before it will affect the strength of the material.
A High molecular weight increases the viscosity of the material
– makes it harder to process the material using conventional methods.
| Chemical Kinematic Viscosity (centistokes) | trans-1,2-Dichloroethylene 0.32 |
|---|
Viscosity is influenced by
the composition of the crude oil, the temperature, dissolved gas content, and the pressure
. As temperature increases, the viscosity will decrease.
A magma’s viscosity is largely controlled by its
temperature, composition, and gas content
(see downloadable programs at the bottom of this page). The effect of temperature on viscosity is intuitive. Like most liquids, the higher the temperature, the more fluid a substance becomes, thus lowering its viscosity.
The density of the fluid decreases when the temperature increases. This, in turn, makes the fluid less viscous.
In liquids, viscosity increases with increasing density
. In gases, viscosity decreases with increasing density.
Viscosity generally increases as
the temperature decreases
. The viscosity of a liquid is related to the ease with which the molecules can move with respect to one another. Thus the viscosity of a liquid depends on the: strength of attractive forces between molecules, which depend on their composition, size, and shape.
Increase in pressure will increases the viscosity
because inter molecular force of attraction increases.
Capillary action
does not affect the viscosity of a liquid.
Put the water at a very low temperature
to increase its viscosity. At lower temperatures, water molecules tend to lose energy, making them pile up each other closely. This piling up results in the water molecules experiencing more friction against each other, making them flow slower or become viscous.
The viscosity of a fluid is
a measure of its resistance to deformation at a given rate
. For liquids, it corresponds to the informal concept of “thickness”: for example, syrup has a higher viscosity than water.
Internal friction
is the cause of viscosity of fluid. The flow of fluid decreases when viscosity increases because viscosity is a frictional force and greater the friction lesser is the flow of liquid.
The interaction forces such as collision and cohesion, and external friction between solid particles which are mainly determined by the particle shape, become the main effects leading to the increase in the viscosity. The external friction forces are smaller between particles of higher sphericity.
When a liquid is heated, the kinetic energy of its molecules increases and the intermolecular attraction becomes weaker. Hence, the viscosity of a liquid
decreases
with increase in its temperature.
