(3Q) Properties of Liquids

Question 1

is the amount of energy required to stretch or increase the surface of a liquid by a unit area. a measure of the force necessary to stretch or break the surface of a liquid, is related to cohesion.

Answer 1

Surface Tension

Question 2

Strong intermolecular forces mean?

Answer 2

High surface tension or High viscosity

Question 3

is the intermolecular attraction between like molecules

Answer 3

Cohesion

Question 4

is an attraction between unlike molecules

Answer 4

Adhesion

Question 5

is a measure of a fluid’s resistance to flow

Answer 5

Viscosity

Question 6

The pressure exerted by a vapor in thermodynamic equilibrium with its
condensed phases at a given temperature in a closed system.

Answer 6

Vapor Pressure

Question 7

Low vapor pressure means?

Answer 7

High IMF

Question 8

Is the heat absorbed by one mole of that substance as it is converted from a liquid to
gas

Answer 8

Molar Heat of Vaporization Hvap

Question 9

Density of water is greatest at?

Answer 9

4 C

Question 10

the region around oxygen has a partial negative charge because

Answer 10

oxygen is more electronegative

Question 11

The region near the two hydrogen atoms has a

Answer 11

partial positive charge

Question 12

Each water molecule
can form hydrogen
bonds with up to

Answer 12

four neighbors

Question 13

The hydrogen bonds
joining water molecules
are weak, about _____ as
strong as covalent bonds.

Answer 13

1/20

Question 14

IS THE AMOUNT OF HEAT THAT MUST BE ABSORBED OR LOST FOR ONE GRAM OF A SUBSTANCE TO CHANGE ITS TEMPERATURE BY 1OC

Answer 14

Specific Heat

Question 15

In a water molecule two hydrogen atoms form

Answer 15

single polar covalent bonds with an oxygen atom.

Question 16

responsible for the
transport of the water column in
plants

Answer 16

Cohesion

Question 17

clinging of one substance to another, contributes too, as water adheres to the wall of the vessels.

Answer 17

Adhesion

Question 18

Water has a greater surface tension than most other liquids because

Answer 18

hydrogen bonds

Question 19

When water reaches 0oC, water becomes ___________ with each
molecule bonded to to the maximum of four partners.

Answer 19

locked into a crystalline lattice

Question 20

Ice is about ___ less dense than water at 4oC

Answer 20

10%