Chapter 8

Question 1

Adhesive force

Answer 1

An attractive force between molecules of two different substances.

Question 2

Capillary action

Answer 2

The rising of liquid into a small vertical space due to the interplay of cohesive and adhesive forces.

Question 3

Cohesive force

Answer 3

An attractive force between molecules of the same substance.

Question 4

Heat of condensation

Answer 4

The energy released by a substance as it transforms from gas to liquid.

Question 5

Heat of freezing

Answer 5

The heat energy released by a substance as it transforms from liquid to solid.

Question 6

Heat of melting

Answer 6

The heat energy absorbed by a substance as it transforms from solid to liquid.

Question 7

Heat of vaporization

Answer 7

The heat energy absorbed by a substance as it transforms from liquid to gas.

Question 8

Meniscus

Answer 8

The curving of the surface of a liquid at the interface between the liquid surface and its container.

Question 9

Specific heat

Answer 9

The quantity of heat required to change the temperature of 1 gram of a substance by 1 Celsius degree.

Question 10

Sublimation

Answer 10

The process of a material transforming from a solid directly to a gas without passing through the liquid phase.

Question 11

Surface tension

Answer 11

The elastic tendency found at the surface of a liquid.