2. Calculate AH for the reaction 4 NH3 (g) + 5 O2 (g) → 4 NO (g)+6 H2O (g), from the following data : N2 (g) + 02 (g) -→2 NO (g) N2 (g) +3 H2 (g) → 2 NH3 (g) 2 H2 (g) + O2 (g) →2 H2O (g) AH = -180.5 kJ AH = -91.8 kJ %3D AH = -483.6 kJ Ans: -1628.2k %3D

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Chapter17: Spontaneity, Entropy, And Free Energy
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Hi! I need help with number 2 please 

+2 02 (g)
2 Ss) + 3 O2g → 2 SO3(g)
.11 X
+
ODE2
296.8 kJ
AH = -791.4 kJ
Given: SO2(e)
) → S(s) + O2e)
+ O2g)
ΔΗ
AH =
%3D
Ans: -197.8kl
2 S(s) + 3 O2(g) → 2 SO3(2)
2. Calculate AH for the reaction 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g), from the
following data :
N2 (g) + 02 (g)→ 2 NO (g)
N2 (g) + 3 H2 (g)→2 NH3 (g)
2 H2 (g) + O2 (g) →2 H2O (g)
AH = -180.5 kJ
AH = -91.8 kJ
3D
AH =
ΔΗ
-483.6 kJ
Ans: -1628.2kJ
3. Find AHf for acetic acid, HC2H3O2, using the following thermochemical data.
HC2H3O2 (1) + 2 02 (2) 2 CO2 (2) + 2 H2O (1)
AH -875. kJ/mol
AH = -394.51 kJ/mol
(1)
C (5) + O2 (2) → CO2 (2)
(s)
+ 02 (2) →C02 (g)
H2 (g) + 1/2 O2 (2) → H2O (1)
AH = -285.8 kJ/mol
Ans: - 485.62kJ/mol
4. Calculate the AH for the reaction 2 NO (2)
+ O218)→ 2 NO2 (2) given:
→ NO212) + One
+ O2(2)
AH -199 kJ
Transcribed Image Text:+2 02 (g) 2 Ss) + 3 O2g → 2 SO3(g) .11 X + ODE2 296.8 kJ AH = -791.4 kJ Given: SO2(e) ) → S(s) + O2e) + O2g) ΔΗ AH = %3D Ans: -197.8kl 2 S(s) + 3 O2(g) → 2 SO3(2) 2. Calculate AH for the reaction 4 NH3 (g) + 5 O2 (g) → 4 NO (g) + 6 H2O (g), from the following data : N2 (g) + 02 (g)→ 2 NO (g) N2 (g) + 3 H2 (g)→2 NH3 (g) 2 H2 (g) + O2 (g) →2 H2O (g) AH = -180.5 kJ AH = -91.8 kJ 3D AH = ΔΗ -483.6 kJ Ans: -1628.2kJ 3. Find AHf for acetic acid, HC2H3O2, using the following thermochemical data. HC2H3O2 (1) + 2 02 (2) 2 CO2 (2) + 2 H2O (1) AH -875. kJ/mol AH = -394.51 kJ/mol (1) C (5) + O2 (2) → CO2 (2) (s) + 02 (2) →C02 (g) H2 (g) + 1/2 O2 (2) → H2O (1) AH = -285.8 kJ/mol Ans: - 485.62kJ/mol 4. Calculate the AH for the reaction 2 NO (2) + O218)→ 2 NO2 (2) given: → NO212) + One + O2(2) AH -199 kJ
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