Thermodynamics

Question 1

thermo

Answer 1

heat

Question 2

dynamics

Answer 2

movement

Question 3

enthalpy

Answer 3

heat energy
bonds breaking and forming

Question 4

entropy

Answer 4

molecular organization
order vs disorder

Question 5

combustion reaction

Answer 5

fire

Question 6

products of a combustion reacion

Answer 6

CO2 and H2O
heat and disorder

Question 7

DG0

Answer 7

standard change in free energy
located at the bottom of the curve

Question 8

if delta G is POSITIVE, do we have more products or reactants

Answer 8

reactants

Question 9

if delta G is NEGATIVE, do we have more products or reactants

Answer 9

products

Question 10

relationship between DG0 and Keq

Answer 10

DG0 = -RT ln Keq
temp is in Kelvin

Question 11

gas constant (R)

Answer 11

8.315 J/K*mol

Question 12

henderson hasselbclch equation

Answer 12

pH = pKa + log [-An]/[HAn]

Question 13

gibbs free energy equation

Answer 13

delta G = DG0 + RT ln ([C][D])/([A][B])

Question 14

negative delta G

Answer 14

spontaneous

Question 15

positive delta G

Answer 15

non-spontaneous

Question 16

the ln of a number less than 1 =

Answer 16

negative

Question 17

move delta G to the left =

Answer 17

more negative

Question 18

move delta G to the right =

Answer 18

more positive

Question 19

the ln of 1 =

Answer 19

0

Question 20

the ln of a number greater than 1 =

Answer 20

positive

Question 21

energy =

Answer 21

heat + disorder

Question 22

two reasons a reaction can occur

Answer 22

the rearrangement of bonds leads to a release of excess energy as heat
the reaction leads to a greater state of disorder

Question 23

delta G =

Answer 23

delta H - (T)delta S

Question 24

delta H

Answer 24

heat in K
enthalpy

Question 25

delta S

Answer 25

entropy
disorder

Question 26

for delta G to be negative

Answer 26

delta H - (T)delta S must be NEGATIVE

Question 27

a large negative delta H means

Answer 27

the release of excess bond energy as heat (exothermic)

Question 28

a large positive delta S means

Answer 28

a significant increase in the state of disorder

Question 29

negative delta H menas

Answer 29

exothermic

Question 30

positive delta S means

Answer 30

greater disorder

Question 31

positive delta H means

Answer 31

endothermic

Question 32

negative delta S means

Answer 32

greater order

Question 33

delta G is positive when

Answer 33

positive delta H and negative delta S
= POSITIVE DELTA G

Question 34

reactions tend to occur in a way that dissipates energy and leads to an

Answer 34

increased disorder

Question 35

place where F and C are the same

Answer 35

-40 degrees

Question 36

change in bond energy between products and reactants

Answer 36

enthalpy

Question 37

spreading and sharing of thermal energy in a system is

Answer 37

entropy

Question 38

weaker bonds = _____ = _____

Answer 38

less stable, higher potential energy

Question 39

stronger bonds = _____ = _____

Answer 39

more stable, lower potential energy

Question 40

• delta H

Answer 40

exothermic

Question 41

+ delta H

Answer 41

endothermic

Question 42

C to K

Answer 42

C + 273.15

Question 43

positive delta G0 (to the left) =