Question

Which statement best explains why heating a liquid affects its viscosity? The molecules move faster at higher temperatures and overcome attractions more easily. The molecules move faster at higher temperatures, and the attractions between them increase. The molecules move slower at higher temperatures and overcome attractions more easily. The molecules move slower at higher temperatures, and the attractions between them decrease.

Answer 1

The first statement i.e. The molecules move faster at higher temperature and overcome attractions more easily is the true statement because by increasing temperature the kinetic energy of molecules increases because kinetic energy is directly proportional to temperature so molecules start to move faster and their inter molecular forces decrease it increases their collision cross sectional area and this increasing collision rate will cause the increase of resistances between them this resistances which a fluid experiences during its flow is called as viscosity.

Answer 2

Answer:

A. the molecules move faster at higher temperatures and overcome attractions more easily