chem h properties unit

Question 0

Density

Answer 0

Closeness of atoms/molecules (g-low l-High s-high)

Question 1

Compressibility

Answer 1

Ability to be pushed together (g-high l-slight s-slight)

Question 2

Ability to fill its container

Answer 2

G-expands completely l-does not expand s-retains its own volume

Question 3

Ability to take shape of it container

Answer 3

G-yes l-yes s-no

Question 4

Rate of diffusion

Answer 4

How fast it spreads out g-High s/l-low

Question 5

Viscosity

Answer 5

Resistance to motion hat exists between mc when they move past each other

Question 6

Ex of high viscosities

Answer 6

Magma honey syrup

Question 7

Ex of Low viscosities

Answer 7

Water kool aid alcohol

Question 8

IMF

Answer 8

Attraction between mc

Question 9

Viscosity depends on IMF

Answer 9

Stronger the forces the higher the viscosity

Question 10

Viscosity depends on temperature

Answer 10

Higher the temperature the lower the viscosity

Question 11

Volatile liquids

Answer 11

Evaporate early bc of weak IMFs

Question 12

Gain energy

Answer 12

Endothermic

Question 13

Lose energy

Answer 13

Exothermic

Question 14

Triple point

Answer 14

Temperature and pressure where 3 phases exist

Question 15

Specific heat capacity

Answer 15

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

Question 16

Unit for specific heat capacity

Answer 16

J/g(*C)

Question 17

Water, copper, and iron heat capacities

Answer 17

4.18,0.385,0.449

Question 18

Specific heat capacity equation

Answer 18

Q=mc/\t

Question 19

Q

Answer 19

Heat transferred in joules

Question 20

M

Answer 20

Mass in grams

Question 21

C

Answer 21

Specific heat capacity in j/gC

Question 22

T

Answer 22

Change in temperature (final-initial)

Question 23

Calorimetry

Answer 23

A lab technique that determines the amount of heat transferred in a chemical or physical process

Question 24

Calorimeter

Answer 24

The instrument used to minimize the heat lost to the surroundings

Question 25

How a calorimeter works

Answer 25

1. Water is put in a calorimeter and the initial temp. Is taken 2. A 2nd substance is heated and the initial temp. Is taken 3. Both masses are taken 4. The substance is put in water & the lid is quickly placed on 5. The temp. Of the water is taken until it's a constant 6. The final temps. Of the water and substance are taken

Question 26

Dynamic equilibrium

Answer 26

When 2 substance are added to each other and come to 1 temperature

Question 27

Qlost+Qgained=

Answer 27

0

Question 28

Equation used to calculate the free energy change when given enthalpy, entropy, and temperature

Answer 28

/\G=/\H-T/\S

Question 29

/\H (Enthalpy)

Answer 29

Heat lost or absorbed in a chemical reaction

Question 30

+/\H

Answer 30

Endothermic, absorbs heat

Question 31

-/\H

Answer 31

exothermic, gives off heat

Question 32

Entropy (S)

Answer 32

Measure of the disorder or randomness in a chemical reaction

Question 33

Entropy and Phase

Answer 33

Gases- most disorder Liquids- less disorder Solids- least disorder

Question 34

+/\S

Answer 34

Products are more disordered that reactants

Question 35

-/\S

Answer 35

Products are less disordered than reactants

Question 36

Gibbs Free Energy

Answer 36

A measure that reflects the Enthalpy, entropy, and temperature of a reaction used to determine spotaneity

Question 37

-/\G

Answer 37

Spontaneous reaction

Question 38

+/\G

Answer 38

Nonspontaneous reaction

Question 39

All reactions prefer to have

Answer 39

``` Low energy (-/\H) High disorder (+/\S)) ```

Question 40

Spontaneity depends on

Answer 40

Energy and disorder

Question 41

-/\H +/\S

Answer 41

-/\G for both (always spontaneous)

Question 42

+/\H-/\S

Answer 42

+/\G for both (always nonspontaneous)

Question 43

- /\H-/\S

Answer 43

High temp. +/\G Nonspontaneous | Low temp. -/\G Spontaneous

Question 44

+ /\H+ /\S

Answer 44

High temp. -/\G Spontaneous | Low temp. +/\G Nonspontaneous