2/12 notes

Question 1

Estimate delta H using bond energies

if bond is broken it is _________ so ________

Answer 1

positive; endothermic

Question 2

Estimate delta H using bond energies

if bond is formed it is __________ so _________

Answer 2

negative; exothermic

Question 3

how to calculate delta H rxn based on bond energies

Answer 3

reaction - products

Question 4

what does tehrmodynamics predict

Answer 4

whetehr a process will occur under the given conditions

Question 5

what is a spontaneous process

Answer 5

a process that does occur naturally under a specific set of conditions

Question 6

what is a non spontanesou process

Answer 6

a process that does not occur naturally under a specific set of conditions

Question 7

if a process is spontaneous in one drection then…..

Answer 7

it must be non spontaneous in opposite direction

Question 8

link between spontaneity and _______ ___ ________

Answer 8

dispersal of matter

ex:
-gas disperses
-mixing
-transfer of thermal energy
-phase change at the right conditions

Question 9

entropy (s) is

Answer 9

a function of dispersion (state finction)

thermodynamic fucniton that increases with number of energetically equivalent ways to range the components of a system to achieve a particular state

Question 10

the weirder it is the ______ entropy there is

Answer 10

more

Question 11

what is a high value of entropy associated with

Answer 11

more dispersal of energy, more disorder or randomness