last lec Flashcards
1
Q
Work in relation to change in pV
A
w= - PΔV (done ON system eg piston push in)
2
Q
heat exhange BETWEEN the system and surroundings =
A
q
3
Q
q = ΔE + pΔV
A
4
Q
at constant volume (ΔV =0)
A
qv=ΔE
5
Q
constant presure
A
qp = ΔE + PΔV = ΔH
6
Q
enthalpy change
A
ΔH=Hproducts - Hreactants
7
Q
Heat capacity (C)
A
C=
8
Q
Second law of thermodynamics
A
Rxns proceed in the direction that increases the ENTROPY of the system plus surroundings
9
Q
Entropy formula
A
ΔS = Sfinal - S inital
10
Q
Positive value of ΔS means
NEgatiuve value of ΔS means
A
Increased disorder
decreased disorder
11
Q
ENTROPY DPEDNDS ON TEMp because
A
as temp increases, disorder decreases
12
Q
A
13
Q
what is sign of total entropy change for a spontaneous process (at eq)
A
0
14
Q
A
