Chapter 5: Thermodynamics Worksheet With Answers - Ap Chemistry 2015-2016 Page 11
ADVERTISEMENT
1
2
3
4
5
6
7
8
9
10
11
12
13
147.
What
i s
t he
Δ E
f or
a
s ystem
w hich
h as
t he
f ollowing
t wo
s teps:
Step
1 :
T he
s ystem
a bsorbs
6 0
J
o f
h eat
w hile
4 0
J
o f
w ork
a re
p erformed
o n
i t.
Step
2 :
T he
s ystem
r eleases
3 0
J
o f
h eat
w hile
d oing
7 0
J
o f
w ork.
a)
100
J
c)
30
J
b)
9 0
J
d)
zero
8.
When
t wo
s olutions
r eact
t he
c ontainer
“ feels
h ot.”
T hus,
a)
the
r eaction
i s
e ndothermic.
b)
t he
r eaction
i s
e xothermic.
c)
the
e nergy
o f
t he
u niverse
i s
i ncreased.
d)
t he
e nergy
o f
b oth
t he
s ystem
a nd
t he
s urroundings
i s
d ecreased.
9.
The
e quation
f or
t he
s tandard
e nthalpy
o f
f ormation
o f
N
O
i s
2
3
a)
N
O(g)
+
O
(g)
→
N
O
(g)
2
2
2
3
b)
N
O
(g)
→
N
O
(g)
+
O
(g)
2
5
2
3
2
c)
NO(g)
+
N O
(g)
→
N
O
(g)
2
2
3
d)
N
(g)
+
/
O
(g)
→
N
O
(g)
3
2
2
2
2
3
10.
For
t he
g eneral
r eaction
2
A
+
B
→
2
A B,
ΔH
i s
+ 50.0
k J.
2
We
c an
c onclude
t hat
a)
t he
r eaction
i s
e ndothermic.
b)
t he
s urroundings
a bsorb
e nergy.
c)
the
s tandard
e nthalpy
o f
f ormation
o f
A B
i s
-‐‑ 5 0.0
k J.
d)
t he
m olecule
A B
c ontains
l ess
e nergy
t han
A
o r
B
.
2
11.
Calculate
t he
e nthalpy
o f
c ombustion
o f
C
H
[ C
H
(g)
+
/
O
(g)
→
3 CO
+
3 H
O]
u sing
t he
f ollowing:
9
3
6
3
6
2
2
2
2
3C(s)
+
3 H
(g)
→
C
H
(g)
ΔH°=
5 3.3
k J
2
3
6
C(s)
+
O
(g)
→
C O
(g)
ΔH°=-‐‑ 3 94
k J
2
2
H
(g)
+
/
O
(g)
→
H
O(l)
ΔH°=-‐‑ 2 86
k J
1
2
2
2
2
a)
-‐‑ 1 517
k J
c)
-‐‑ 6 26
k J
b)
1 304
k J
d)
-‐‑ 2 093
k J
12.
Which
o ne
o f
t he
f ollowing
w ould
h ave
a n
e nthalpy
o f
f ormation
v alue
( ΔH
)
o f
z ero?
f
a)
H
O(g)
c)
H
O(l)
2
2
b)
O (g)
d)
O
(g)
2
13.
Calculate
t he
h eat
o f
v aporization
o f
t itanium
( IV)
c hloride:
T iCl
(l)
→
T iCl
(g)
u sing
t he
f ollowing
4
4
enthalpies
o f
r eaction:
Ti(s)
+
2 Cl
(g)
→
T iCl
(l)
ΔH°=-‐‑ 8 04.2
k J
2
4
TiCl
(g)
→
2 Cl
(g)
+
T i(s)
ΔH°=
7 63.2
k J
4
2
a)
-‐‑ 1 567
k J
c)
1165
k J
b)
-‐‑ 7 83.7
k J
d)
41
k J
ADVERTISEMENT
0 votes
Related Articles
Related forms
Related Categories
Parent category: Education