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Baking soda thrown on a grease fire will decompose in the following manner. 2NaHCO3(s) -+ NazCO3(s) + CO2(9) + H20() Use the following heats of...
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Chemistry Assignment with full solutions for me to understand the content thank youScreen Shot 2020-07-24 at 1.46.30 PM.pngScreen Shot 2020-07-24 at 1.45.07 PM.pngScreen Shot 2020-07-24 at 1.40.03 PM.png

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8. Baking soda thrown on a grease fire will decompose in the following
manner.
2NaHCO3(s)
-+
NazCO3(s) + CO2(9) + H20()
Use the following heats of formation of the various products and
reactants in the above equation to find the overall heat of formation AHf for
the overall reaction. (4)
AHf 2NaHCO3(s) = -948 kJ/mol
AHf NazCO3(s) = -1131 KJ/mol
AHf H20()
= -188 kJ/mol
AHf CO2(9) = -394 KJ/mol
9. Calculate the voltage of the cell given the following standard reduction
potentials of Fe and Mn and write the overall cell as a spontaneous reaction:
(4)
Fe2+
+
2e- - Fe(s)
Eo = -0.44 V
Mn2+
+ 2e-
Mn(s)
Eo = -1.18 V
Screen Shot 2020-07-24 at 1.45.07 PM.png
Standard Enthalpy of Formation Data of Selected Elements and Compounds
Substance
AH,
Substance
Substance
AH,
KJ
KJ
KJ
mol
mol
mol
Al (S)
0
F2 ( 9 )
0
O3 ( 9)
142.3
Al203 (S)
-1669.8
HF (9)
-268.6
P (s) (white)
0
Br2 (1)
0
H2 (9 )
0
P (s) (red)
-18.4
HBr (9)
36.2
H20 (1)
-285.8
PH3 (9)
9.2
Ca (s)
0
H2O (9)
-249.2
PC13 (9)
-306.4
CaCO3 (s)
-1206.7
H202 (1)
-187.6
P406 (S)
-2144.3
(calcite)
CaCl2 (s)
-795
Fe ( s )
0
P4010 ( $)
-2984.0
C (s)
0
FeO (s)
-266.5
H3PO4 (S)
-1281.1
(graphite)
C (S)
1.9
Fe203 (s)
-822.2
K (S )
0
(diamond)
CCI4 ()
-139.3
Fe304 (S)
-1117.1
KCI ( S )
-435.9
CCI4 (9)
-106.7
FeCl2 (s)
-341
KCIO3 (S)
-391.2
CHCl3 (9)
-82.0
FeCl3 (s)
-405.0
KOH (S)
-425.8
CH4 (9)
-74.8
FeS2 (s)
-177.9
Ag (s)
0
C2 H2 (9)
226.7
Pb (s)
0
AgCI (s)
-127.0
C2H4 (9)
52.3
PbCl2 (s)
-359.2
AgNO3 (S)
-123.1
C2H6 (9)
-84.7
Mg (s)
0
Na (s
0
C3H8 (9)
-103.8
MgCl2 (s)
641.8
NaCl (s)
-411
C6H6 (1)
82.9
MgO (s)
601.8
NaOH (s)
-426.7
CH3OH (1)
-238.6
Hg (1)
0
NazCO3 (s)
-1130.9
C2H5OH (1)
-277.6
HgS (s) (red)
-58.2
S ( S )
0
(rhombic)
CH3CO2H (1)
-487.0
Ne (9)
O
S (9)
222.8
CO (9)
-110.5
N2 (9)
0
SF6 (9)
-1096.2
CO2 (9)
-393.5
NH3 (9)
-46.2
H 2S ( 9)
-20.1
CIO2 (9)
103.3
N2H4 (1)
50.4
SO2 (9)
-296.9
CS2 (9)
115.3
NH4CI (s)
315.4
SO3 (9)
-395.2
C12 (9)
0
NH4NO3 (S)
-365.1
H2SO4 (1)
-811.3
HCI (9)
-92.3
NO (9)
90.4
Sn ( s)
0
(white)
Cr ( s )
0
NO2 (9)
33.8
Sn ( s)
2.5
(gray)
CrCl3 (s)
-563.2
N20 (9)
81.5
SnCl2 (s)
-349.8
Cu (s )
0
N204 (9)
9.2
SnCl4 (1)
-545.2
CuO (s)
-155.2
HNO3 (1)
-173.2
CuCI
-136
O (9)
249.2
CuCl2 (s)
-205.9
O2 (9)
0
Screen Shot 2020-07-24 at 1.46.30 PM.png
STANDARD REDUCTION POTENTIALS FOR HALF-REACTIONS
Ionic concentrations are a 1 M in water at 25 C
Half-reaction
E (Volts)
F2() + 2e -> 2F .......
+2.87
H,O2 + 2 H* + 2e -> 2 H2 .......
+1.77
MnO, + 8 H + 5e -> Mn2+ + 4 H,O
.......
+1.52
Aut + 3e -> Au(s) ..........".
+1.50
Cl2(@) + 2 e - 2 CI .......
+1.36
Cr20,2 + 14 H* + 6e -> 2 Cr3 + 7 H,O
+1.33
MnO2(5) + 4H + 2 e -> Mn2* + 2 H,O
+1.28
1/2 02(@) + 2 H* + 2 e -> HO
+1.23
Br, (1) + 2 e - 2Br .......
+1.06
NO, + 4 H* + 3e -> NO) + 2 H,O
+0.96
1/2 02() + 2 H* + 2 e -> H,O
+0.82
Agt +e -> Agg) .....".
+0.80
NO, + 2 H*+e -> NO260) + HO
+0.78
Felt +e-> Felt
+0.77
O2() + 2H* + 2 e -> H202
+0.68
I2(s) + 2e - 2 1 ......
+0.53
Cut + 2e -> Cu(s) ..........".
+0.34
SO 2 + 4 H* + 2e -> SO2(@) + 2 HO
+0.17
Sn# + 2 e -> Sn2+
+0.15
So) + 2 H + 2 e -> HS()
+0.14
2H* + 2e -> H2(g)
0.00
Felt + 3e -> Fe(s)
-0.04
pb2+ + 2e - Pb(s)
-0.13
Sn2+ + 2e - Sn(s)
....
-0.14
Ni2 + 2e -> Ni(s)
-0.25
Cd2+ + 2e -> Cd(s)
-0.40
Felt + 2e -> Fe(s)
-0.44
Cr3 + 3e -> CI(s)
-0.74
Zn2+ + 2e"-> Zn(s)
-0.76
2H,O + 2e -> 2OH + H2(8)
-0.83
Mn2+ + 2e' -> Mn(s)
-1.18
A13+ + 3e -> Al(5) ........
-1.66
Mg2+ + 2e - Mg(s)
-2.37
Nat +e -> Na(s)
-2.71
Cart + 2e -> Ca(s)
-2.87
S+ 2+ + 2e - SI(s )
-2.89
Bart + 2e -> Ba(s)
-2.90
Cs* + e' -> CS(s)
........
-2.92
K +e -> K(s)
-2.92
Lit +e -> Li(s) ....
. .......
-3.00

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