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Chemical reactions
3NH4SCN + 70Fe2O3 🔥→ 3N2O↑ + Fe2(SO4)3 + 3FeCO3 + 45Fe3O4 + 6H2O

3NH₄SCN + 70Fe₂O₃ 🔥→ 3N₂O↑ + Fe₂(SO₄)₃ + 3FeCO₃ + 45Fe₃O₄ + 6H₂O

Last updated: May 12, 2022

Reaction of ammonium thiocyanate and iron(III) oxide: 3NH₄SCNAmmonium thiocyanate + 70Fe₂O₃Iron(III) oxide
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3N₂O↑Dinitrotgen monoxide + Fe₂(SO₄)₃Iron(III) sulfate + 3FeCO₃Iron(II) carbonate + 45Fe₃O₄Iron(II,III) oxide + 6H₂OWater

The reaction of ammonium thiocyanate and iron(III) oxide yields dinitrotgen monoxide, iron(III) sulfate, iron(II) carbonate, iron(II,III) oxide, and water (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:

Reaction of reducing species and reducible species

Table of contents

Reaction data

Chemical equation

Reaction of ammonium thiocyanate and iron(III) oxide: 3NH₄SCNAmmonium thiocyanate + 70Fe₂O₃Iron(III) oxide
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3N₂O↑Dinitrotgen monoxide + Fe₂(SO₄)₃Iron(III) sulfate + 3FeCO₃Iron(II) carbonate + 45Fe₃O₄Iron(II,III) oxide + 6H₂OWater

General equation

Reaction of reducing species and reducible species: Reducing speciesReducing agent + Reducible speciesOxidizing agent
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ProductOxidation product + ProductReduction product

Oxidation state of each atom

Reaction of ammonium thiocyanate and iron(III) oxide

Reactants

Chemical formula	Name	Coefficient	Type	Type in general equation
NH₄SCN	Ammonium thiocyanate	3	Reducing	Reducing
Fe₂O₃	Iron(III) oxide	70	Oxidizing	Reducible

Products

Chemical formula	Name	Coefficient	Type	Type in general equation
N₂O	Dinitrotgen monoxide	3	Oxidized	–
Fe₂(SO₄)₃	Iron(III) sulfate	1	Oxidized	–
FeCO₃	Iron(II) carbonate	3	Reduced	–
Fe₃O₄	Iron(II,III) oxide	45	Reduced	–
H₂O	Water	6	–	–

Thermodynamic changes

Changes in standard condition

Reaction of ammonium thiocyanate and iron(III) oxide: 3NH₄SCNCrystalline solid + 70Fe₂O₃Crystalline solid
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3N₂O↑Gas + Fe₂(SO₄)₃Crystalline solid + 3FeCO₃Crystalline solidsiderite + 45Fe₃O₄Crystalline solid + 6H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	1330.1	–	–	–
per 1 mol of Ammonium thiocyanate	443.37	–	–	–
per 1 mol of Iron(III) oxide	19.001	–	–	–
per 1 mol of Dinitrotgen monoxide	443.37	–	–	–
per 1 mol of Iron(III) sulfate	1330.1	–	–	–
per 1 mol of Iron(II) carbonate	443.37	–	–	–
per 1 mol of Iron(II,III) oxide	29.558	–	–	–
per 1 mol of Water	221.68	–	–	–

Changes in aqueous solution (1)

Reaction of ammonium thiocyanate and iron(III) oxide ◆ Δ_rG 867.8 kJ/mol K 0.93 × 10⁻¹⁵² pK 152.03: 3NH₄SCNIonized aqueous solution + 70Fe₂O₃Crystalline solid
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3N₂O↑Gas + Fe₂(SO₄)₃Ionized aqueous solution + 3FeCO₃Crystalline solidsiderite + 45Fe₃O₄Crystalline solid + 6H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	1018.7	867.8	483.1	–
per 1 mol of Ammonium thiocyanate	339.57	289.3	161.0	–
per 1 mol of Iron(III) oxide	14.553	12.40	6.901	–
per 1 mol of Dinitrotgen monoxide	339.57	289.3	161.0	–
per 1 mol of Iron(III) sulfate	1018.7	867.8	483.1	–
per 1 mol of Iron(II) carbonate	339.57	289.3	161.0	–
per 1 mol of Iron(II,III) oxide	22.638	19.28	10.74	–
per 1 mol of Water	169.78	144.6	80.52	–

Changes in aqueous solution (2)

Reaction of ammonium thiocyanate and iron(III) oxide: 3NH₄SCNIonized aqueous solution + 70Fe₂O₃Crystalline solid
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3N₂O↑Aqueous solution + Fe₂(SO₄)₃Ionized aqueous solution + 3FeCO₃Crystalline solidsiderite + 45Fe₃O₄Crystalline solid + 6H₂OLiquid

	Standard enthalpy of reaction Δ_rH° kJ · mol⁻¹	Standard Gibbs energy of reaction Δ_rG° kJ · mol⁻¹	Standard entropy of reaction Δ_rS° J · K⁻¹ · mol⁻¹	Standard heat capacity of reaction at constant pressure Δ_rC_p° J · K⁻¹ · mol⁻¹
per 1 mol of Equation	940.8	–	–	–
per 1 mol of Ammonium thiocyanate	313.6	–	–	–
per 1 mol of Iron(III) oxide	13.44	–	–	–
per 1 mol of Dinitrotgen monoxide	313.6	–	–	–
per 1 mol of Iron(III) sulfate	940.8	–	–	–
per 1 mol of Iron(II) carbonate	313.6	–	–	–
per 1 mol of Iron(II,III) oxide	20.91	–	–	–
per 1 mol of Water	156.8	–	–	–

Thermodynamic data of reactants

Chemical formula	Standard enthalpy of formation Δ_fH° kJ · mol⁻¹	Standard Gibbs energy of formation Δ_fG° kJ · mol⁻¹	Standard molar entropy S° J · K⁻¹ · mol⁻¹	Standard molar heat capacity at constant pressure C_p° J · K⁻¹ · mol⁻¹
NH₄SCN (cr)	-78.7^[1]	–	–	–
NH₄SCN (ai)	-56.07^[1]	13.40^[1]	257.7^[1]	39.7^[1]
Fe₂O₃ (cr)	-824.2^[1]	-742.2^[1]	87.40^[1]	103.85^[1]

* (cr):Crystalline solid, (ai):Ionized aqueous solution

Thermodynamic data of products

Chemical formula	Standard enthalpy of formation Δ_fH° kJ · mol⁻¹	Standard Gibbs energy of formation Δ_fG° kJ · mol⁻¹	Standard molar entropy S° J · K⁻¹ · mol⁻¹	Standard molar heat capacity at constant pressure C_p° J · K⁻¹ · mol⁻¹
N₂O (g)	82.05^[1]	104.20^[1]	219.85^[1]	38.45^[1]
N₂O (aq)	56.1^[1]	–	–	–
Fe₂(SO₄)₃ (cr)	-2581.5^[1]	–	–	–
Fe₂(SO₄)₃ (ai)	-2825.0^[1]	-2242.8^[1]	-571.5^[1]	–
FeCO₃ (cr) siderite	-740.57^[1]	-666.67^[1]	92.9^[1]	82.13^[1]
Fe₃O₄ (cr)	-1118.4^[1]	-1015.4^[1]	146.4^[1]	143.43^[1]
H₂O (cr)	–	–	–	–
H₂O (l)	-285.830^[1]	-237.129^[1]	69.91^[1]	75.291^[1]
H₂O (g)	-241.818^[1]	-228.572^[1]	188.825^[1]	33.577^[1]

* (g):Gas, (aq):Aqueous solution, (cr):Crystalline solid, (ai):Ionized aqueous solution, (l):Liquid

References

List of references

1
Janiel J. Reed (1989)
The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI Units
https://doi.org/10.18434/M32124
National Institute of Standards and Technology (NIST)
Citation list