How do the viscosity of liquids and low density gases depend on the temperature and pressure?

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. Kinematic viscosity is the absolute viscosity of a fluid divided by its mass density.

How does viscosity of liquid and gases vary with temperature and pressure?

Viscosity of liquids depends on the cohesive force. Higher thetemperature, lesser is the cohesion so viscosity decreases. Higher the temperature, more energy possessed by the molecules and thus greater the momentum of colliding gas molecules. Thus viscosity increases with increases intemperature for gases.

How does viscosity of liquids vary with pressure?

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 happens to the viscosity of liquid and gas when the temperature is increased Mcq?

With the increase in temperature of a liquid, cohesion increases, leading to the rise in viscosity. Viscosity of a gas is due to the momentum transfer between it’s molecules. With the increase in the temperature of a liquid, molecular motion increases, leading to the fall in viscosity.

What is viscosity What is the cause of it in liquids and in gases?

Viscosity is caused by friction within a fluid. It is the result of intermolecular forces between particles within a fluid.

Why does the viscosity of liquids decrease with temperature?

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.

How does viscosity of gases depend on temperature?

With an increase in temperature, there is typically an increase in the molecular interchange as molecules move faster in higher temperatures. The gas viscosity will increase with temperature. With high temperatures, viscosity increases in gases and decreases in liquids, the drag force will do the same.

Does viscosity depend on density?

Viscosity has no dependence on density, it is a measurement of the resistance to shearing forces. But kinematic viscosity is the ratio of viscosity to density.

How does temperature affect density?

The warmer the water, the more space it takes up, and the lower its density. When comparing two samples of water with the same salinity, or mass, the water sample with the higher temperature will have a greater volume, and it will therefore be less dense.

How does temperature affect viscosity and density?

In general, liquids tend to get “thinner” when their temperature increases. For example, honey and oil tend to flow better at higher temperatures. Therefore, increasing temperature decreases viscosity. Therefore, increasing temperature decreases density.

Which of the following correctly states how the viscosities of liquid and gas will change with temperature?

4. Which of the following correctly states how the viscosities of a liquid and a gas will change with temperature? Explanation: Viscosity of a liquid is due to the cohesion between it’s molecules. With the increase in temperature of a liquid, cohesion increases, leading to the rise in viscosity.