34.5k views
3 votes
With increase of temperature the viscocity in general of

User Eriknelson
by
8.4k points

2 Answers

4 votes

Liquids decreases, meaning that the flow of the liquid becomes less resistant. This is due to the increase in kinetic energy of the molecules in the liquid. As the temperature increases, the molecules move faster and are more likely to overcome intermolecular forces that cause resistance to flow.

However, this is not always the case, as some liquids may experience an increase in viscosity with increasing temperature. This is known as a negative temperature coefficient of viscosity and is observed in some liquids that undergo structural changes at higher temperatures.

User TechnoIndifferent
by
8.0k points
0 votes

Final answer:

The viscosity of a liquid decreases with temperature as increased temperature reduces the effects of cohesive forces. Conversely, the viscosity of a gas increases with temperature as higher temperature creates more collisions between particles.

Step-by-step explanation:

The viscosity of a liquid decreases with temperature because increased temperature reduces the effects of cohesive forces in the liquid. As the temperature increases, the molecules in the liquid move more rapidly, and their kinetic energies are better able to overcome the forces holding them together. This leads to a decrease in viscosity.

On the other hand, the viscosity of a gas increases with temperature because increased gas temperature creates more collisions between atoms and molecules. Higher temperature means higher kinetic energy of the gas particles, leading to more frequent and energetic collisions, which in turn increases the viscosity of the gas.

User Jthegedus
by
8.3k points