H2S(g) + 2 O2(g) SO3(g) + H2O(l)
H2S(g) + 2 O2(g) H2SO4(l) ΔH = - 392.5 kJH2SO4(l) SO3(g) + H2O(g) ΔH = +102.5 kJH2O(g) H2O(l) ΔH = - 55.0 kJ
H2S(g) + 2 O2(g) SO3(g) + H2O(l)
H2S(g) + 2 O2(g) H2SO4(l) ΔH = - 392.5 kJH2SO4(l) SO3(g) + H2O(g) ΔH = +102.5 kJH2O(g) H2O(l) ΔH = - 55.0 kJ
- 392.5 kJ
H2S(g) + 2 O2(g) SO3(g) + H2O(l)
H2S(g) + 2 O2(g) H2SO4(l) ΔH = - 392.5 kJH2SO4(l) SO3(g) + H2O(g) ΔH = +102.5 kJH2O(g) H2O(l) ΔH = - 55.0 kJ
- 392.5 kJ
+ 102.5 kJ
H2S(g) + 2 O2(g) SO3(g) + H2O(l)
H2S(g) + 2 O2(g) H2SO4(l) ΔH = - 392.5 kJH2SO4(l) SO3(g) + H2O(g) ΔH = +102.5 kJH2O(g) H2O(l) ΔH = - 55.0 kJ
- 392.5 kJ
+ 102.5 kJ- 55.0 kJ
4 PCl5(g) → P4(s) + 10 Cl2(g)
P4(s) + 6 Cl2(g) → 4 PCl3(g) ΔH = -2371.3 kJ
PCl3(g) + Cl2(g) → PCl5(g) ΔH = -242.7 kJ
4 PCl5(g) → P4(s) + 10 Cl2(g)
P4(s) + 6 Cl2(g) → 4 PCl3(g) ΔH = -2371.3 kJ
PCl3(g) + Cl2(g) → PCl5(g) ΔH = -242.7 kJ
4 PCl5(g) → 4 PCl3(g) + 4 Cl2(g) ΔH = +970.8 kJ
Flip, x 4
4 PCl5(g) → P4(s) + 10 Cl2(g)
P4(s) + 6 Cl2(g) → 4 PCl3(g) ΔH = -2371.3 kJ
PCl3(g) + Cl2(g) → PCl5(g) ΔH = -242.7 kJ
4 PCl5(g) → 4 PCl3(g) + 4 Cl2(g) ΔH = +970.8 kJ
4 PCl3(g) → P4(s) + 6 Cl2(g) ΔH = +2371.3
kJ
Flip
4 PCl5(g) → P4(s) + 10 Cl2(g)
P4(s) + 6 Cl2(g) → 4 PCl3(g) ΔH = -2371.3 kJ
PCl3(g) + Cl2(g) → PCl5(g) ΔH = -242.7 kJ
4 PCl5(g) → 4 PCl3(g) + 4 Cl2(g) ΔH = +970.8 kJ
4 PCl3(g) → P4(s) + 6 Cl2(g) ΔH = +2371.3
kJ
4 PCl5(g) → P4(s) + 10 Cl2(g) ΔH = 3342.1
kJ
N2(g) + 3 H2(g) → 2 NH3(g)
2 NH3(g) + 4 H2O(l) → 2 NO2(g) + 7 H2(g) ΔH = -57.0 kJ
2 NO2(g) → N2(g) + 2 O2(g) ΔH = +33.0 kJ
2 H2O(l) → 2 H2(g) + O2(g) ΔH = -34.8 kJ
N2(g) + 3 H2(g) → 2 NH3(g)
2 NH3(g) + 4 H2O(l) → 2 NO2(g) + 7 H2(g) ΔH = -57 kJ
2 NO2(g) → N2(g) + 2 O2(g) ΔH = +33 kJ
2 H2O(l) → 2 H2(g) + O2(g) ΔH = -34.8 kJ
2 NO2(g) + 7 H2(g) → 2 NH3(g) + 4 H2O(l) ΔH = +57 kJ
Flip
N2(g) + 3 H2(g) → 2 NH3(g)
2 NH3(g) + 4 H2O(l) → 2 NO2(g) + 7 H2(g) ΔH = -57 kJ
2 NO2(g) → N2(g) + 2 O2(g) ΔH = +33 kJ
2 H2O(l) → 2 H2(g) + O2(g) ΔH = -34.8 kJ
2 NO2(g) + 7 H2(g) → 2 NH3(g) + 4 H2O(l) ΔH = +57 kJ
N2(g) + 2 O2(g) → 2 NO2(g) ΔH = -33 kJ
Flip
N2(g) + 3 H2(g) → 2 NH3(g)
2 NH3(g) + 4 H2O(l) → 2 NO2(g) + 7 H2(g) ΔH = -57 kJ
2 NO2(g) → N2(g) + 2 O2(g) ΔH = +33 kJ
2 H2O(l) → 2 H2(g) + O2(g) ΔH = -34.8 kJ
2 NO2(g) + 7 H2(g) → 2 NH3(g) + 4 H2O(l) ΔH = +57 kJ
N2(g) + 2 O2(g) → 2 NO2(g) ΔH = -33 kJ
4 H2O(l) → 4 H2(g) + 2 O2(g) ΔH = -69.6 kJ
x 2
N2(g) + 3 H2(g) → 2 NH3(g)
2 NH3(g) + 4 H2O(l) → 2 NO2(g) + 7 H2(g) ΔH = -57 kJ
2 NO2(g) → N2(g) + 2 O2(g) ΔH = +33 kJ
2 H2O(l) → 2 H2(g) + O2(g) ΔH = -34.8 kJ
3
2 NO2(g) + 7 H2(g) → 2 NH3(g) + 4 H2O(l) ΔH = +57 kJ
N2(g) + 2 O2(g) → 2 NO2(g) ΔH = -33 kJ
4 H2O(l) → 4 H2(g) + 2 O2(g) ΔH = -69.6 kJ
N2(g) + 3 H2(g) → 2 NH3(g) ΔH = -45.6 kJ
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g)
2 Fe(s) + 3 CO2(g) → Fe2O3(s) + 3 CO(g) ΔH = +12.9 kJ
3 FeO(s) + CO2(g) → Fe3O4(s) + CO(g) ΔH = +10.1 kJ
FeO(s) + CO(g) → Fe(s) + CO2(g) ΔH = +0.6 kJ
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g)
2 Fe(s) + 3 CO2(g) → Fe2O3(s) + 3 CO(g) ΔH = +12.9 kJ
3 FeO(s) + CO2(g) → Fe3O4(s) + CO(g) ΔH = +10.1 kJ
FeO(s) + CO(g) → Fe(s) + CO2(g) ΔH = +0.6 kJ
3 Fe2O3(s) + 9 CO(g) → 6 Fe(s) + 9 CO2(g) ΔH = -38.7 kJ
Flip,x 3
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g)
2 Fe(s) + 3 CO2(g) → Fe2O3(s) + 3 CO(g) ΔH = +12.9 kJ
3 FeO(s) + CO2(g) → Fe3O4(s) + CO(g) ΔH = +10.1 kJ
FeO(s) + CO(g) → Fe(s) + CO2(g) ΔH = +0.6 kJ
3 Fe2O3(s) + 9 CO(g) → 6 Fe(s) + 9 CO2(g) ΔH = -38.7 kJ
6 FeO(s) + 2 CO2(g) → 2 Fe3O4(s) + 2 CO(g) ΔH = +20.2 kJ
x 2
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g)
2 Fe(s) + 3 CO2(g) → Fe2O3(s) + 3 CO(g) ΔH = +12.9 kJ
3 FeO(s) + CO2(g) → Fe3O4(s) + CO(g) ΔH = +10.1 kJ
FeO(s) + CO(g) → Fe(s) + CO2(g) ΔH = +0.6 kJ
3 Fe2O3(s) + 9 CO(g) → 6 Fe(s) + 9 CO2(g) ΔH = -38.7 kJ
6 FeO(s) + 2 CO2(g) → 2 Fe3O4(s) + 2 CO(g) ΔH = +20.2 kJ
6 Fe(s) + 6 CO2(g) → 6 FeO(s) + 6 CO(g) ΔH = -3.6 kJ
Flip, x 6
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g)
2 Fe(s) + 3 CO2(g) → Fe2O3(s) + 3 CO(g) ΔH = +12.9 kJ
3 FeO(s) + CO2(g) → Fe3O4(s) + CO(g) ΔH = +10.1 kJ
FeO(s) + CO(g) → Fe(s) + CO2(g) ΔH = +0.6 kJ
3 Fe2O3(s) + 9 CO(g) → 6 Fe(s) + 9 CO2(g) ΔH = -38.7 kJ
6 FeO(s) + 2 CO2(g) → 2 Fe3O4(s) + 2 CO(g) ΔH = +20.2 kJ
6 Fe(s) + 6 CO2(g) → 6 FeO(s) + 6 CO(g) ΔH = -3.6 kJ
3 Fe2O3(s) + CO(g) → 2 Fe3O4(s) + CO2(g) ΔH = -22.1 kJ
C2H4(g) + 6 F2(g) 2 CF4(g) + 4 HF(g) H2(g) + F2(g) 2HF(g) H = – 537 kJ C(s) + 2 F2(g) CF4(g) H = – 680 kJ 2 C(s) + 2 H2(g) C2H4(g) H = + 52.3 kJ
C2H4(g) + 6 F2(g) 2 CF4(g) + 4 HF(g) H2(g) + F2(g) 2HF(g) H = - 537 kJC(s) + 2 F2(g) CF4(g) H = - 680 kJ2 C(s) + 2 H2(g) C2H4(g) H = + 52.3 kJ
2 H2(g) + 2 F2(g) 4 HF(g) H = - 1074 kJ2 C(s) + 4 F2(g) 2 CF4(g) H = - 1360 kJC2H4(g) 2 C(s) + 2 H2(g) H = - 52.3 kJ
C2H4(g) + 6 F2(g) 2 CF4(g) + 4 HF(g) H = - 2486 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
½ N2 + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
½ N2 + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) → 3/2 N2(g) + 3O2(g) ΔH = -3(ΔH°f) = -101.4 kJ
Flip,x 3
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
½ N2 + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) → 3/2 N2(g) + 3O2(g) ΔH = -3(ΔH°f) = -101.4 kJ
H20(l) → H2(g) + ½ O2(g) ΔH = -(ΔH°f) = +285.8 kJ
Flip
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
½ N2 + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) → 3/2 N2(g) + 3O2(g) ΔH = -3(ΔH°f) = -101.4 kJ
H20(l) → H2(g) + ½ O2(g) ΔH = -(ΔH°f) = +285.9 kJ
H2(g) + N2(g) + 3 O2(g) → 2 HNO3(l) ΔH = 2(ΔH°f) = -346.4 kJ
x 2
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
½ N2(g) + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) → 3/2 N2(g) + 3O2(g) ΔH = -3(ΔH°f) = -101.4 kJ
H20(l) → H2(g) + ½ O2(g) ΔH = -(ΔH°f) = +285.9 kJ
H2(g) + N2(g) + 3 O2(g) → 2 HNO3(l) ΔH = 2(ΔH°f) = -346.4 kJ
½ N2(g) + ½ O2(g) → NO(g) ΔH = (ΔH°f ) = +90.4 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -174.1 kJ
½ N2(g) + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) → 3/2 N2(g) + 3O2(g) ΔH = -3(ΔH°f) = -101.4 kJ
H20(l) → H2(g) + ½ O2(g) ΔH = -(ΔH°f) = +285.9 kJ
H2(g) + N2(g) + 3 O2(g) → 2 HNO3(l) ΔH = 2(ΔH°f) = -346.4 kJ
½ N2(g)+ ½ O2(g) → NO(g) ΔH = (ΔH°f ) = +90.4 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g) ΔH = -71.5 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g)
½ N2(g) + O2(g) → NO2(g) ΔH°f = +33.8 kJ
H2(g) + ½ O2(g) → H20(l) ΔH°f = -285.9 kJ
½ H2(g) + ½ N2(g) + 3/2 O2(g) → HNO3(l) ΔH°f = -173.2 kJ
½ N2(g) + ½ O2(g) → NO(g) ΔH°f = +90.4 kJ
3 NO2(g) → 3/2 N2(g) + 3O2(g) ΔH = -3(ΔH°f) = -101.4 kJ
H20(l) → H2(g) + ½ O2(g) ΔH = -(ΔH°f) = +285.9 kJ
H2(g) + N2(g) + 3 O2(g) → 2 HNO3(l) ΔH = 2(ΔH°f) = -346.4 kJ
½ N2(g)+ ½ O2(g) → NO(g) ΔH = (ΔH°f ) = +90.4 kJ
3 NO2(g) + H2O(l) → 2 HNO3(l) + NO(g) ΔH = -71.5 kJ
ΔH = [2(ΔH°f) + ΔH°f] – [3(ΔH°f) + ΔH°f]
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