What is the effect of temperature on the viscosity of liquids and gases?

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.

How does temperature affect the viscosity of liquid?

The viscosity decreases with an increase in temperature. Most liquids suffer the exponential relationship (Seeton, 2006) between temperature and viscosity rather than linear form (Fig. 6.1). The more viscous the fluid, the more sensitive it is to the temperature change.

How does temp affect gas viscosity?

The gas viscosity will increase with temperature. According to the kinetic theory of gases, viscosity should be proportional to the square root of the absolute temperature, in practice, it increases more rapidly. The result is that liquids show a reduction in viscosity with increasing temperature.

How the viscosity of liquids and gases depends on pressure and temperature?

For liquids an increase in temperature reduces the viscosity while an increase in pressure increases the viscosity, but to a much lesser degree. Petroleum products and liquids with complex molecular structures, being relatively more compressible than other liquids, are more sensitive to pressure.

How does kinematic viscosity vary with temperature?

Kinematic Viscosity: Viscosity increases with temperature for gases and decreases with temperature for liquids. Kinematic viscosity is absolute viscosity divided by density, e.g. Kinematic viscosity at t 0 = absolute viscosity at t ° density at t o .

What is the effect of temperature on the viscosity of liquids Class 11?

The viscosity of liquid increases rapidly with rise of temperature.

What is the effect of temperature and pressure on viscosity?

Thus, as temperature increases, the average intermolecular forces decrease. The actual manner in which the two quantities vary is nonlinear and changes abruptly when the liquid changes phase. Viscosity is normally independent of pressure, but liquids under extreme pressure often experience an increase in viscosity.

Why does viscosity decrease with temperature?

Increasing temperature results in a decrease in viscosity because a larger temperature means particles have greater thermal energy and are more easily able to overcome the attractive forces binding them together.

What is the effect of temperature on gas?

As the temperature of a solid, liquid or gas increases, the particles move more rapidly. As the temperature falls, the particles slow down. If a liquid is cooled sufficiently, it forms a solid. If a liquid is heated sufficiently, it forms a gas.