Q27E The surface tension and viscosit... [FREE SOLUTION]

Chapter 10: Q27E (page 587)

The surface tension and viscosity of water at several different temperatures are given in this table.
(a) As temperature increases, what happens to the surface tension of water? Explain why this occurs, in terms of molecular interactions and the effect of changing temperature.
(b) As temperature increases, what happens to the viscosity of water? Explain why this occurs, in terms of molecular interactions and the effect of changing temperature.

Short Answer

Expert verified

As the temperature of the water increases, the kinetic energy of the molecules also increases, and it increases to an extent that it overcomes the attractive intermolecular forces (hydrogen bonding). This overcoming of the intermolecular force leads to a decreasing surface tension.

Step by step solution

Definition of Surface Tension

Surface Tension is the tendency of liquid surfaces at relaxation to reduce into the minimal floor location possible. Surface Tensionis what lets items with a better density than water, like razor blades or bugs, to drift on a water surfacewithoutsubmerging them.

Surface Tension of water

(a) As the temperature of the water increases, the kinetic energy of the molecules also increases, and it increases to an extent that it overcomes the attractive intermolecular forces (hydrogen bonding). This overcoming of intermolecular pressure leads to a reduction of floor tension.

Viscosity of water

b) Because of the identical reasons stated above, a comparable fashion is located in viscosity. Hence, as the temperature of the water increases, the kinetic strength of the molecules will also additionally increase, and it will increase to a quantity that it overcomes the appealing intermolecular forces (hydrogen bonding). This overcoming of intermolecular pressure ends in reducing floor tension.