monium dichromate is sometimes known as Vesuvian Fire, because of its use in demonstrations of tabletop "volcanoes". Using given data, calculate the heat of reaction for the following reaction: (NH4)2Cr2O7(s) –→ Cr2O3(s) + N2(g) +4H2O(g) AH (k) mol") U mol K) AG (k) mol") Species Nitrogen N(g) 191.5 N(g) NH,(g) 472.704 153.19 455.579 -46.11 192.3 -16.5 NH,(aq) -80.29 111.3 -26.50 NH,"(aq) -132.51 113.4 -79.31 50.63 121.2 149.2 (NH.),AsO(aq) -1268 NH,Br(s) -270.83 113 -175.2 NH,C6) -314.4 94.6 -201.5 NH,Caq) - 300.2 NH,HCO,() -847 12.1 -666 NH,I6) -201.4 117 -113 NH,NO,6) - 365.6 151.1 -184.0 (NH),SO) -1180.85 220.1 -901.67 NF,(g) NO(g) NO,(g) -125 260.6 -83.3 90.25 210.7 86.57 33.2 240.0 51.30 N,Og) 82.05 219.7 104.2 N;O,(g) N;O(g) N,0,(g) 83.72 321.28 139.46 9.16 304.2 97.82 11 356 115 N,O,6) -43.1 178 114 NOCI) 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) 130.6 H,O() -285.8 69.91 -237.2 H,Og) H;O(0) -241.8 188.7 -228.6 -187.8 109.6 -120.4 Cbromium Cr(s) 23.8 CrO,(s) Cr,Cl,6) (NH,) Cr0,() -1139.7 81.2 -1058.1 -556.5 123.0 -486.1 -1807

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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)2Cr2O7(s) → Cr2O3(s) + N2(g) +4H20(g)
AH
(k)
mol-")
S°
U mol-
K-')
AG°
(kJ
mol)
Species
Nitrogen
N(g)
191.5
N(g)
472.704
153.19
455.579
NH,(g)
NH,(aq)
NH,*(aq)
-46.11
192.3
-16.5
-80.29
111.3
-26.50
-132.51
113.4
-79.31
N,H,(€)
(NH,),ASO((aq)
NH,Br(s)
50.63
121.2
149.2
-1268
-270.83
113
-175.2
NH,CIs)
NH,CI(aq)
NH,HCO,(s)
-314.4
94.6
-201.5
- 300.2
-847
12.1
-666
NH,I(s)
NH,NO,(s)
-201.4
117
-113
- 365.6
151.1
-184.0
(NH,),SO,(s)
-1180.85
220.1
-901.67
NF,(g)
-125
260.6
-83.3
90.25
210.7
86.57
NO(g)
NO,(g)
33.2
240.0
51.30
N,O(g)
82.05
219.7
104.2
N,O,(g)
83.72
321.28
139.46
N,O.(g)
N,0,(g)
N;O,(s)
NOCI(g)
HNO,(()
9.16
304.2
97.82
11
356
115
-43.1
178
14
52.59
264
66.36
-174.1
155.6
-80.79
HNO,(g)
-135.1
266.2
-74.77
HNO, (aq)
-206.6
146
-110.5
Hydrogen
H(g)
H(g)
218.0
114.6
203.3
130.6
H,O(0)
-285.8
69.91
-237.2
-241.8
H;O(g)
H;O;()
188.7
-228.6
-187.8
109.6
-120.4
Cbromium
Cr(s)
23.8
Cr,O,(s)
-1139.7
81.2
-1058.1
Cr,Cl,(s)
-556.5
123.0
-486.1
(NH,) ¿Cr,O;(s)
-1807
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)2Cr2O7(s) → Cr2O3(s) + N2(g) +4H20(g) AH (k) mol-") S° U mol- K-') AG° (kJ mol) Species Nitrogen N(g) 191.5 N(g) 472.704 153.19 455.579 NH,(g) NH,(aq) NH,*(aq) -46.11 192.3 -16.5 -80.29 111.3 -26.50 -132.51 113.4 -79.31 N,H,(€) (NH,),ASO((aq) NH,Br(s) 50.63 121.2 149.2 -1268 -270.83 113 -175.2 NH,CIs) NH,CI(aq) NH,HCO,(s) -314.4 94.6 -201.5 - 300.2 -847 12.1 -666 NH,I(s) NH,NO,(s) -201.4 117 -113 - 365.6 151.1 -184.0 (NH,),SO,(s) -1180.85 220.1 -901.67 NF,(g) -125 260.6 -83.3 90.25 210.7 86.57 NO(g) NO,(g) 33.2 240.0 51.30 N,O(g) 82.05 219.7 104.2 N,O,(g) 83.72 321.28 139.46 N,O.(g) N,0,(g) N;O,(s) NOCI(g) HNO,(() 9.16 304.2 97.82 11 356 115 -43.1 178 14 52.59 264 66.36 -174.1 155.6 -80.79 HNO,(g) -135.1 266.2 -74.77 HNO, (aq) -206.6 146 -110.5 Hydrogen H(g) H(g) 218.0 114.6 203.3 130.6 H,O(0) -285.8 69.91 -237.2 -241.8 H;O(g) H;O;() 188.7 -228.6 -187.8 109.6 -120.4 Cbromium Cr(s) 23.8 Cr,O,(s) -1139.7 81.2 -1058.1 Cr,Cl,(s) -556.5 123.0 -486.1 (NH,) ¿Cr,O;(s) -1807
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