Explain why the viscosity of a liquid decreases with temperature—that is, how might increase temperature reduce the effects of cohesive forces in a liquid? Also explain why the viscosity of a gas increases with temperature—that is, how does increased gas temperature create more collisions between atoms and molecules?
A.
When temperature increases , kinetic energy of liquid molecules increases and the distance between the molecule increases. It causes a decrease in inter-molecular attraction between them, which reduces viscosity . Increase the temperature of a liquid is to reduce the cohesive forces
B. When temperature increases of gas than randomness of molecules increases.viscosity of a gas is caused by the transfer of momentum from one gas molecule to another. So, increasing the temperature of a gas will increase its momentum and so the viscosity.
Hope you got. Please upvote. Thanks
Get Answers For Free
Most questions answered within 1 hours.