Liquids And Solids

Question 0

Polar molecules have little attraction in the _______ state because ________

Answer 0

Gaseous

They are very far apart

Question 1

Polar molecules are also called _____ because they have a slightly negative and slightly positive end

Answer 1

Dipoles

Question 2

Highly polar molecules have higher boiling points than low polar molecules because

Answer 2

They have stinger attractive forces

Question 3

Covalent bond strength from weakest to strongest

Answer 3

London, dipole dipole, H bond

Question 4

London forces are also called

Answer 4

Dispersion forces
Van der waal’s forces
Instantaneous dipole forces
Induced dipole forces

Question 5

What are London forces

Answer 5

Weak instantaneous dipoles that are attracted toward each other

Question 6

Small atoms have ______polarizablities

Answer 6

Low

Question 7

Big atoms have __________ polarizablities

Answer 7

High

Question 8

Polarizablity

Answer 8

The ease with which the electron cloud around an atom or molecule may be deformed into a dipole
(Ability to make an atom polar)

Question 9

Hydrogen bonds occur when hydrogen bonds with

Answer 9

N O or F

NOF

Question 10

Surface tension

Answer 10

Attractive forces between molecules at the surface of a liquid

Question 11

Cohesive forces

Answer 11

Attractions between identical molecules in a liquid

Question 12

Adhesive forces

Answer 12

Attractions between different molecules in a liquid or a flat surface

Question 13

Viscosity

Answer 13

A liquids resistance to flow

Question 14

Ex of a high viscosity

Answer 14

Syrup (think liquid)

Question 15

Ex of a low viscosity

Answer 15

Water

Question 16

Low viscosity is seen in substances with

Answer 16

Low attractive forces

Question 17

Vapor pressure

Answer 17

The pressure that develops in the gas phase above a liquid in a closed container

Question 18

Normal boiling point

Answer 18

Boiling point at 1 ATM

Question 19

Boiling occurs when

Answer 19

Vapor pressure is equal to atmospheric pressure around the liquid

Question 20

Heat of vaporization

Answer 20

Energy needed to convert 1 gram of liquid into 1 gram of gas at a temp at normal boiling point

Question 21

Heat of vaporization is equal to

Answer 21

Negative heat of condensation

Question 22

Polar substances have _______ heats of vaporization than non polar substances

Answer 22

Higher

Question 23

Lattice energy

Answer 23

Energy needed to distrust a crystal

Question 24

The strongest attractive force in chem

Answer 24

A cation attracted to an anion

Question 25

Lattice energy in ionic compounds is

Answer 25

Very high

Question 26

Molecular crystals may be composed of

Answer 26

Either nonmetals or covenant molecules

Question 27

Network crystals has atoms that are _________ bonded together

Answer 27

Covalently

Question 28

Triple point

Answer 28

Point at which all 3 phases exist in equilibrium

Question 29

The only substance to not have a triple point is _______ because ________

Answer 29

Helium

It does not have a solid phase

Question 30

Critical point

Answer 30

Maximum point at which any liquid may exist

Question 31

Supercritical fluid

Answer 31

Point past critical point, no difference between gases and liquids

Question 32

Sublimation

Answer 32

From a solid to a gas