Ammonium dichromate is sometimes known as Vesuvian Fire, because of its use in demonstrations of tabletop "volcanoes". Using the given data, calculate the heat of reaction for the following reaction: (NH4),Cr,O;(s) → Cr,O3(s) + N½(g) +4H,0(g) AH ( mol") U mol K) AG (J mol) ... Species Nitrogen 191.5 N(g) NHg) 472.704 153.19 455.579 -46.11 192.3 -16.5 NH,(ag) -80.29 III.3 -26.50 NH,"(4) -132.51 113.4 -79.31 50.63 121.2 1492 (NHAOfaq) -1268 -270.83 113 -175.2 NH.C) NH,Cag) NHHCO6) -3144 -300.2 94.6 -201.5 -847 12.1 -666 NH,16) -201.4 117 -113 -3656 -1180.85 NH,NO,6) 151.1 -184.0 (NH),SO49) 220.1 -901.67 NFAg) --125 260.6 -83.3 NOg) 90.25 210.7 86.57 NO 33.2 240.0 51.30 NO(g) 82.05 219.7 104.2 83.72 321.28 139.46 NO 9.16 304.2 97.82 N,O(g) 356 115 NO4) -43.1 178 114 NOCg) 52.59 264 66.36 HNO(0 -174.1 155.6 -80.79 HNO -135.1 266.2 -74.77 HNO, (ag) -206.6 146 -110.5 Hydrogen Hg) 218.0 114.6 203.3 130.6 -285.8 69.91 -237.2 HOg) -241.8 188.7 -228.6 OFO'H Chremium -1878 109.6 -120.4 Crs) 23.8 -1058.1 CrO,69) CrC) -1139.7 812 -556.5 123.0 -486.1 (NH) Cr0) -1807
Ammonium dichromate is sometimes known as Vesuvian Fire, because of its use in demonstrations of tabletop "volcanoes". Using the given data, calculate the heat of reaction for the following reaction: (NH4),Cr,O;(s) → Cr,O3(s) + N½(g) +4H,0(g) AH ( mol") U mol K) AG (J mol) ... Species Nitrogen 191.5 N(g) NHg) 472.704 153.19 455.579 -46.11 192.3 -16.5 NH,(ag) -80.29 III.3 -26.50 NH,"(4) -132.51 113.4 -79.31 50.63 121.2 1492 (NHAOfaq) -1268 -270.83 113 -175.2 NH.C) NH,Cag) NHHCO6) -3144 -300.2 94.6 -201.5 -847 12.1 -666 NH,16) -201.4 117 -113 -3656 -1180.85 NH,NO,6) 151.1 -184.0 (NH),SO49) 220.1 -901.67 NFAg) --125 260.6 -83.3 NOg) 90.25 210.7 86.57 NO 33.2 240.0 51.30 NO(g) 82.05 219.7 104.2 83.72 321.28 139.46 NO 9.16 304.2 97.82 N,O(g) 356 115 NO4) -43.1 178 114 NOCg) 52.59 264 66.36 HNO(0 -174.1 155.6 -80.79 HNO -135.1 266.2 -74.77 HNO, (ag) -206.6 146 -110.5 Hydrogen Hg) 218.0 114.6 203.3 130.6 -285.8 69.91 -237.2 HOg) -241.8 188.7 -228.6 OFO'H Chremium -1878 109.6 -120.4 Crs) 23.8 -1058.1 CrO,69) CrC) -1139.7 812 -556.5 123.0 -486.1 (NH) Cr0) -1807
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Chapter6: Thermochemisty
Section: Chapter Questions
Problem 6.132QP
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Transcribed Image Text:Ammonium dichromate is sometimes known as Vesuvian Fire, because of its use in demonstrations of tabletop "volcanoes". Using
the given data, calculate the heat of reaction for the following reaction:
(NH4)½Cr207(s) –→ Cr2O3(s) + N½(g) +4H,O(g)
AH
(k
mol)
AG
U mol
K)
...
Species
mol")
Nitrogem
Ng)
191.5
Ng)
NH,(g)
472.704
153.19
455.579
-46.11
192.3
-16.5
NH,(aq)
NH,"(aq)
- 80.29
III.3
-26.50
-132.51
113.4
-79.31
N,HC)
50.63
121.2
149.2
(NH),AsO/aq)
-1268
NH,Br(s)
-270.83
113
-175.2
NH,C6)
NH,Caq)
NH,HCO,6)
-314.4
94.6
-201.5
-300.2
-847
12.1
-666
NH,I(s)
-201.4
117
-113
NH,NO,)
-3656
151.1
-184.0
(NH),SO)
-1180.85
220.1
-901.67
NF(g)
NO(g)
NOg)
-125
260.6
-83.3
90.25
210.7
86.57
33.2
240.0
31.30
N,Og)
82.05
219.7
104.2
N,O,(g)
83.72
321.28
139.46
N,Odg)
9.16
304.2
97.82
N,O(g)
356
115
-43.1
178
114
NOCIG)
52.59
264
66.36
HNO(0
-174.1
155.6
-80.79
HNO(g)
-135.1
266.2
-74.77
HNO, (aq)
-206.6
146
-110.5
Hydrogen
H(g)
218.0
114.6
203.3
H(g)
H,O()
130.6
-285.8
69.91
-237.2
-241.8
188.7
H,O(g)
H,O,(0)
-228.6
-187.8
109.6
-120.4
Chromium
Crs)
23.8
Cr,O,()
-1139.7
81.2
-1058.1
Cr,Cl)
(NH) CrO()
-556.5
123.0
-486.1
-1807
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