Calculate the heat released (in kJ) when 520.59 grams of benzene (C,H6) are cooled from 114.9°C to 2.0°C. AHvap= 33.8 kJ/mol %3D ΔΗu = 10.9 kJ/mol Boiling Point = 80.1°C Melting Point= 5.5°C Csp(1) = 1.70 J/g° c %3D Csp(s)= 1.51 J/g°C Csp(g)= 1.05 J/g°C Enter your answer using 2 decimal places

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter5: Thermochemistry
Section: Chapter Questions
Problem 5.24QE
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Teacher stated that there should only be one final answer using two decimal places, not three answers. 

Calculate the heat released (in kJ) when 520.59 grams of benzene (C6H6) are cooled from 114.9° C to 2.0°C.
AHvap= 33.8 kJ/mol
AH fus= 10.9 kJ/mol
Boiling Point = 80.1°C
Melting Point= 5.5°C
Csp(1) = 1.70 J/g°C
Csp(s)= 1.51 J/g°C
Csp(g)= 1.05 J/g°C
Enter your answer using 2 decimal places
Transcribed Image Text:Calculate the heat released (in kJ) when 520.59 grams of benzene (C6H6) are cooled from 114.9° C to 2.0°C. AHvap= 33.8 kJ/mol AH fus= 10.9 kJ/mol Boiling Point = 80.1°C Melting Point= 5.5°C Csp(1) = 1.70 J/g°C Csp(s)= 1.51 J/g°C Csp(g)= 1.05 J/g°C Enter your answer using 2 decimal places
ABBREVIATIONS AND SYMBOLS
CONSTANTS & CONVERSIONS
molar mass
M
amount of substance
atmosphere
atomic mass unit
gas constant
R
n
mole
mol
R= 8.314 J•mol-1·K-'
g
Planck's constant
h
atm
gram
hour
R= 0.0821 L·atm•mol-l·K-'
h
u
atomic molar mass
A
joule
J
pressure
P
NA = 6.022 × 1023 mol-'
kelvin
K
second
Avogadro constant
Celsius temperature
|centi- prefix
energy of activation
enthalpy
frequency
NA
h= 6.626 × 10-34 J-s
°C
kilo- prefix
k
speed of light
liter
L
temperature, K
T.
c = 2.998 × 10® m·s-'
Ea
measure of pressure mmHg
time
0 °C = 273.15 K
1 atm = 760 mmHg
H
milli- prefix
volume
V
m
molar
M
1 atm = 760 torr
EQUATIONS
q = MC¸AT
c = Av
PV = nRT
AE = q +w
E = hv
PERIODIC TABLE OF THE ELEMENTS
1
18
1
2
H
Не
1.008
2
13
14
15
16
17
4.003
4
6.
7
9.
10
Li
Ве
В
F
Ne
6.941
9.012
10.81
12.01
14.01
16.00
19,00
20.18
11
12
13
14
15
16
17
18
Na
Mg
Si
Al
26.98
S
32.07
CI
Ar
22.99
24.31
3
4
7
9
10
11
12
30.97
33
28.09
35.45
39.95
19
20
21
22
23
24
25
Mn
26
27
28
29
30
31
32
34
35
36
K
Са
Sc
Ti
V
Cr
Fe
Co
Ni
Cu
Zn
Ga
69.72
Ge
As
Se
Br
Kr
39.10
40.08
44.96
47.88
50.94
52.00
54.94
55.85
58.93
58.69
63,55
65.39
72.61
74.92
78.96
79.90
83.80
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
Rb
Sr
Y
Zr
Nb
Мо
Tc
Ru
Rh
Pd
In
Ag
107.9
Cd
Sn
Sb
Те
I
Хе
85.47
87.62
88.91
91.22
92.91
95.94
101.1
102.9
106.4
112,4
114.8
118.7
121.8
127.6
126.9
131.3
55
56
57
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
Cs
Ва
La
Hf
Та
W
Re
Os
Ir
Pt
Au
Hg
TI
Pb
Bi
Po
At
Rn
132,9
137.3
138.9
178.5
180.9
183.8
186.2
190.2
192.2
195.1
197.0
200,6
204.4
207.2
209.0
87
88
89
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
Fr
Ra
Ac
Rf
Db
Sg
Bh
Hs
Mt
Ds
Rg
Cn
Nh
F1
Mc
Lv
Ts
Og
58
59
60
61
62
63
64
65
66
67
68
69
70
71
Се
Pr
Nd
Pm
Sm
Eu
Gd
Tb
Dy
Но
Er
Tm
Yb
Lu
140,1
140.9
144.2
150.4
152.0
157.3
158.9
162,5
164,9
167.3
168,9
173,0
175,0
EB
90
91
92
93
94
95
96
97
98
99
100
101
102
103
Th
Ра
U
Np
Pu
Am
Cm
Bk
Cf
Es
Fm
Md
No
Lr
232.0
231.0
238.0
Transcribed Image Text:ABBREVIATIONS AND SYMBOLS CONSTANTS & CONVERSIONS molar mass M amount of substance atmosphere atomic mass unit gas constant R n mole mol R= 8.314 J•mol-1·K-' g Planck's constant h atm gram hour R= 0.0821 L·atm•mol-l·K-' h u atomic molar mass A joule J pressure P NA = 6.022 × 1023 mol-' kelvin K second Avogadro constant Celsius temperature |centi- prefix energy of activation enthalpy frequency NA h= 6.626 × 10-34 J-s °C kilo- prefix k speed of light liter L temperature, K T. c = 2.998 × 10® m·s-' Ea measure of pressure mmHg time 0 °C = 273.15 K 1 atm = 760 mmHg H milli- prefix volume V m molar M 1 atm = 760 torr EQUATIONS q = MC¸AT c = Av PV = nRT AE = q +w E = hv PERIODIC TABLE OF THE ELEMENTS 1 18 1 2 H Не 1.008 2 13 14 15 16 17 4.003 4 6. 7 9. 10 Li Ве В F Ne 6.941 9.012 10.81 12.01 14.01 16.00 19,00 20.18 11 12 13 14 15 16 17 18 Na Mg Si Al 26.98 S 32.07 CI Ar 22.99 24.31 3 4 7 9 10 11 12 30.97 33 28.09 35.45 39.95 19 20 21 22 23 24 25 Mn 26 27 28 29 30 31 32 34 35 36 K Са Sc Ti V Cr Fe Co Ni Cu Zn Ga 69.72 Ge As Se Br Kr 39.10 40.08 44.96 47.88 50.94 52.00 54.94 55.85 58.93 58.69 63,55 65.39 72.61 74.92 78.96 79.90 83.80 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 Rb Sr Y Zr Nb Мо Tc Ru Rh Pd In Ag 107.9 Cd Sn Sb Те I Хе 85.47 87.62 88.91 91.22 92.91 95.94 101.1 102.9 106.4 112,4 114.8 118.7 121.8 127.6 126.9 131.3 55 56 57 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 Cs Ва La Hf Та W Re Os Ir Pt Au Hg TI Pb Bi Po At Rn 132,9 137.3 138.9 178.5 180.9 183.8 186.2 190.2 192.2 195.1 197.0 200,6 204.4 207.2 209.0 87 88 89 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 Fr Ra Ac Rf Db Sg Bh Hs Mt Ds Rg Cn Nh F1 Mc Lv Ts Og 58 59 60 61 62 63 64 65 66 67 68 69 70 71 Се Pr Nd Pm Sm Eu Gd Tb Dy Но Er Tm Yb Lu 140,1 140.9 144.2 150.4 152.0 157.3 158.9 162,5 164,9 167.3 168,9 173,0 175,0 EB 90 91 92 93 94 95 96 97 98 99 100 101 102 103 Th Ра U Np Pu Am Cm Bk Cf Es Fm Md No Lr 232.0 231.0 238.0
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