Gen Chem Day 7

Question 0

change in heat, not state funciton

Answer 0

Q

Question 1

a function that only depends upon the inital and final states of the system, being independent of the pathway taken

Answer 1

state function

Question 2

Enthalpy

Answer 2

H

Question 3

exothermic

Answer 3

H<0 releases heat

Question 4

endothermic

Answer 4

H>0 needs heat

Question 5

change H=

Answer 5

qp… pressure of heat

Question 6

Hess’s law… ways to calculate H

Answer 6

pick the ones that add up to your goal

Question 7

Bond dissociation energy

Answer 7

Change H= sum D broken- sum D formed

Question 8

Bond breaking is

Answer 8

endothermic

Question 9

Bond making is

Answer 9

exothermic

Question 10

Enthalpies of Formation

Answer 10

change H= sum n H products - sum n H reactants

Question 11

forms 1 mole of a single substance from its component elements in their standard states

Answer 11

formation rxn

Question 12

Calorie

Answer 12

1000 cal

Question 13

Calorimetry

Answer 13

q=CchangeT or q=mcchangeT

Question 14

Entropy (S)

Answer 14

phases of matter S=sum S products - sum S reactants… focus on moles

Question 15

c= specific heat

Answer 15

4.184 J/ g*c

Question 16

Temp does

Answer 16

Not change during phase change

Question 17

G<0

Answer 17

spontaneous

Question 18

G>0

Answer 18

nonspontaneous

Question 19

G=0

Answer 19

at equilbrium

Question 20

Gas in a piston

Answer 20

1. Transfer of heat (lock piston)

2. Expanding gases cool; compressing gases warm (real, not ideal)

Question 21

Isobaric

Answer 21

(change P=0… no change in pressure

Question 22

isochoric

Answer 22

change V = 0 so w=0… no work

Question 23

isothermal

Answer 23

change T =0 so change E=0 NOCHANGE

Question 24

Adiabatic

Answer 24

q=0 anti temp exchange… no temp change

Question 25

Zeroth law

Answer 25

concept of thermal equilibrium and temp

Question 26

1. thermodynamics

Answer 26

energy can be neather created nor destroyed

Question 27

2 thermodynamics

Answer 27

for a spontaneous process, the entropy of the universe increases… system vs surrouding

Question 28

3 thermodynamics

Answer 28

a perfect crystal at 0K has zero entropy

Question 29

change E=

Answer 29

q+w

Question 30

w=

Answer 30

-Pchange V

Question 31

change G=

Answer 31

sum n G products- sum n G reactants

Question 32

change G=

Answer 32

change G degree + RTlnQ

Question 33

change G=

Answer 33

-RTlnKeq

Question 34

change S=

Answer 34

change H/ T

Question 35

change G=

Answer 35

change H- T change S

Question 36

H- S-

Answer 36

sponateous at low temp

Question 37

H+ S+

Answer 37

spontaneous at high tem

Question 38

H- S+

Answer 38

always sponteous

Question 39

H+ S-

Answer 39

non spontaneous at all temps

Question 40

Expansion

Answer 40

v>0, w<0

Question 41

compression

Answer 41

v0