The
viscosity of liquids decreases rapidly with an increase in temperature
, and the viscosity of gases increases with an increase in temperature. Thus, upon heating, liquids flow more easily, whereas gases flow more sluggishly.
Which statement is true about viscosity?
The smaller the molecules, the more viscous the liquid
.
O
.
The higher the temperature
, the more viscous the liquid. O All of the answers are true.
Which statements about viscosity are true viscosity increases as temperature decreases?
The
viscosity of liquids decreases rapidly with an increase in temperature
, and the viscosity of gases increases with an increase in temperature. Thus, upon heating, liquids flow more easily, whereas gases flow more sluggishly.
What causes an increase or decrease in viscosity?
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.
Does viscosity increase as molecular weight increases?
A
High molecular weight increases the viscosity of the material
– makes it harder to process the material using conventional methods. The longer the chains, the harder it is to get them to flow because they are more tangled.
What is effect of temperature on viscosity?
The increase in temperature causes the kinetic or thermal energy to increase and the molecules become more mobile. The
attractive binding energy is reduced
and therefore the viscosity is reduced.
Will viscosity increase as temperature increases?
Viscosity depends strongly on temperature. In liquids it usually decreases with increasing temperature, whereas, in
most gases, viscosity increases with increasing temperature
.
Is alcohol less viscous than water?
The viscosity of pure alcohols and aqueous solutions is found to increase almost linearly with increasing pressure, whereas that of
water decreases slightly with pressure at temperatures below 298
K.
Does viscosity depend on intermolecular forces?
Intermolecular forces present in a liquid is a factor which affects its viscosity.
Higher the intermolecular forces, higher will be the viscosity
. … The attractive force between the molecules of the same type is called cohesive force. Hence we can say that higher the cohesive forces in a liquid higher is its viscosity.
What is viscous substance?
Viscosity is
a material property which describes the resistance of a fluid to shearing flows
. It corresponds roughly to the intuitive notion of a fluid’s ‘thickness’. For instance, honey has a much higher viscosity than water. … Of all fluids, gases have the lowest viscosities, and thick liquids have the highest.
What are 3 factors that affect viscosity?
The viscosity of liquids generally depends upon
the size, shape and chemical nature of their molecules
. It is greater with larger than with smaller molecules; with elongated than with spherical molecules.
What are the factors that affects viscosity?
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. As a result, viscosity measurements are always reported with the temperature at which the measurement is made.
What causes low viscosity?
Oils operating
at extreme high temperatures can begin to crack thermally. The high temperatures can sheer/crack the oil molecules into smaller molecules, which causes a decrease in viscosity.
Which molecule has highest viscosity?
Liquids which flow very slowly, like
glycerin or honey
, have high viscosities. Those like ether or gasoline which flow very readily have low viscosities. Viscosity is governed by the strength of intermolecular forces and especially by the shapes of the molecules of a liquid.
How does weight affect viscosity?
Polymers with a higher molecular weight provide higher viscosity
, as shown in Figure p28. Non-Newtonian fluid is considered pseudoplastic if the apparent viscosity decreases as the shear rate increases.
What is the difference between rheology and viscosity?
The key difference between rheology and viscosity is that
rheology is the study of the flow of matter
, whereas viscosity is a measure of its resistance to deformation. Rheology is a branch of physics or physical chemistry, while viscosity is a quantitative measurement that is useful in chemistry.
