Thermodynamics PPT Chemistry Class 12

 Page 1


3day inservvice course
Page 2


3day inservvice course
FORMULA THERMODYNAMIC
? ?U=q+w
?W=P
ex
.(- ?V)= - P
ex 
?V= P
ex
(V
f
-V
i
)
?W=-?P
in
dV
?W
rev
=-? P
ex
dV =-? (P
m
C dp) dV
?W
rev
=-? P
m
dV
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3day inservvice course
FORMULA THERMODYNAMIC
? ?U=q+w
?W=P
ex
.(- ?V)= - P
ex 
?V= P
ex
(V
f
-V
i
)
?W=-?P
in
dV
?W
rev
=-? P
ex
dV =-? (P
m
C dp) dV
?W
rev
=-? P
m
dV
?W
rev
=-? nRT dV/V=-nRT In V
f
/V
i
=-2.303nRT log V
f
/V
i
?q
p
=(U
2
+pV
2
)-(U
1
+pV
1
)
?H=U+pV
? ?H= ?U + p ?V
?P ?V= ?n
g
RT
Page 4


3day inservvice course
FORMULA THERMODYNAMIC
? ?U=q+w
?W=P
ex
.(- ?V)= - P
ex 
?V= P
ex
(V
f
-V
i
)
?W=-?P
in
dV
?W
rev
=-? P
ex
dV =-? (P
m
C dp) dV
?W
rev
=-? P
m
dV
?W
rev
=-? nRT dV/V=-nRT In V
f
/V
i
=-2.303nRT log V
f
/V
i
?q
p
=(U
2
+pV
2
)-(U
1
+pV
1
)
?H=U+pV
? ?H= ?U + p ?V
?P ?V= ?n
g
RT
? ?H= ?U + ?n
g
RT
?q=c x m x ?T=C ?T
? ?H= ?U + R ?T
?C
p
-C
v
=R
? ?
r
H=(sum of enthalpies of product)-( sum 
of enthalpies of reactant)
=?a
i 
H products-?b
i 
H reactants
i i
? ?
r
Hº==?a
i 
?
j
Hºproducts-?b
i 
?
j
Hº reactants
Page 5


3day inservvice course
FORMULA THERMODYNAMIC
? ?U=q+w
?W=P
ex
.(- ?V)= - P
ex 
?V= P
ex
(V
f
-V
i
)
?W=-?P
in
dV
?W
rev
=-? P
ex
dV =-? (P
m
C dp) dV
?W
rev
=-? P
m
dV
?W
rev
=-? nRT dV/V=-nRT In V
f
/V
i
=-2.303nRT log V
f
/V
i
?q
p
=(U
2
+pV
2
)-(U
1
+pV
1
)
?H=U+pV
? ?H= ?U + p ?V
?P ?V= ?n
g
RT
? ?H= ?U + ?n
g
RT
?q=c x m x ?T=C ?T
? ?H= ?U + R ?T
?C
p
-C
v
=R
? ?
r
H=(sum of enthalpies of product)-( sum 
of enthalpies of reactant)
=?a
i 
H products-?b
i 
H reactants
i i
? ?
r
Hº==?a
i 
?
j
Hºproducts-?b
i 
?
j
Hº reactants
? ?
r
Hº==?a
i 
?
j
Hºproducts-?b
i 
?
j
Hº 
reactants
?
r
H= ?
r
H
1
+ ?
r
H
2
+ ?
r
H
3
? ?
r
H
v
=? bond enthalpies 
reactants
-? 
bond enthalpies 
products
? ?S= q
rev
/T
? ?S
total
= ?S
system
+ ?S
suit
>0