DAT Gen Chem Liquids and Solids

Question 1

attractive or
repulsive interactions between neighboring
molecules that determine the physical
properties of molecules such as boiling point,
melting point, solubility, and density.

Answer 1

intermolecular forces

Question 2

interactions within a
molecule that hold atoms together in a
molecule, such as covalent, ionic, metallic, and
hydrogen bonds.

Answer 2

intramolecular

Question 3

transition from liquid to solid is called…

Answer 3

crystalization

Question 4

does crystallization take in or release heat

Answer 4

release

Question 5

transition from liquid to gas is..

Answer 5

vaporization

Question 6

transition from gas to liquid is

Answer 6

condensation

Question 7

transition from solid straight to gas,
without bypassing the liquid phase,

Answer 7

sublimation

Question 8

transition from gas straight to solid,
bypassing the liquid phase,

Answer 8

deposition

Question 9

correlated to the disorder, or
randomness, in a system.

Answer 9

entropy (s)

Question 10

measures the energy, or heat, in a
thermodynamics system.

Answer 10

enthalpy (h)

Question 11

If ΔH > 0, heat moves…

Answer 11

into the system

Question 12

If ΔH < 0, heat moves…

Answer 12

out of system, exothermic

Question 13

the heat of vaporization is greater than
the

Answer 13

heat of melting

Question 14

the heat of sublimation is greater
than the

Answer 14

heat of vaporization

Question 15

Standard Enthalpy of Formation or ΔHf eqn

Answer 15

delt hf= (delt H of products x number of moles) - (delt H of reactants x number of moles)

Question 16

The solid-liquid boundary is represented by a
line called the

Answer 16

fusion curve

Question 17

The liquid-gas boundary is represented by the

Answer 17

vaporization curve

Question 18

The solid-gas boundary is represented by the

Answer 18

sublimation curce

Question 19

the point where a substance
exists in the liquid, gaseous, and solid phases
all at once.

Answer 19

triple pt

Question 20

the point at which the
liquid and gas phases become
indistinguishable.

Answer 20

critical point

Question 21

substance passed critical point is Called what

Answer 21

supercritical

Question 22

the degree to which a liquid mixes
with another liquid.

Answer 22

miscibility

Question 23

measure of a fluid’s
resistance to flow or deformation.

Answer 23

viscocity

Question 24

ability of a liquid surface
to resist external forces.

Answer 24

surface tension

Question 25

equilibrium pressure
exerted by a vapor above its liquid in a closed
system.

Answer 25

vapor pressure

Question 26

incompressible, with a definite shape
and volume.

Answer 26

solids

Question 27

hard, non-conductive,

Answer 27

ionic solids

Question 28

brittle

Answer 28

ionic solid

Question 29

high melting pt

Answer 29

ionic solid

Question 30

malleable ductile

Answer 30

metallic solid

Question 31

conductive, high luster

Answer 31

metallic solid

Question 32

variable melting pt and hardness

Answer 32

metallic solid

Question 33

hard, non-
conductive, and have high melting points.

Answer 33

covalent network solids

Question 34

soft, non-conductive, and
have low melting points.

Answer 34

molecular solids

Question 35

In Simple Cubic unit cells, there is

Answer 35

one atom per unit cell

Question 36

Amorphous solids, such as glass, have no

Answer 36

long-
range molecular pattern or order to them.

Question 37

are 2
atoms per unit cell with 1 atom being in the
center of the cube and each of the 8 corners
contributing another eighth of an atom each.

Answer 37

body centered cubic

Question 38

there are 4
atoms per unit cell. The 6 faces of the cube
each contribute half an atom, totaling 3 atoms,
and the 8 corners of the cube each contribute
an eighth on an atom, totaling 1 atom.

Answer 38

face centered cubic