(NH4)3PO4 ๐ฅโ 3NH3โ + PH3โ + 2O2โ
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- Decomposition of ammonium phosphate
Decomposition of ammonium phosphate yields ammonia, , and (Other reactions are here). This reaction is an oxidation-reduction reaction and is classified as follows:
Table of contents
Reaction data
Chemical equation
- Decomposition of ammonium phosphate
General equation
- Thermal decomposition with redox
- Thermally decomposable substanceSelf redox agent๐ฅโถ ProductOxidation product + ProductReduction product
- Thermal decomposition of oxoacid salt with redox
- Oxoacid saltSelf redox agent๐ฅโถ ProductOxidation product + ProductReduction product
Oxidation state of each atom
- Decomposition of ammonium phosphate
Reactants
Chemical formula | Name | Coefficient | Type | Type in general equation |
---|---|---|---|---|
(NH4)3PO4 | Ammonium phosphate | 1 | Self redox agent | Thermally decomposable Oxoacid salt |
Products
Thermodynamic changes
Changes in standard condition
- Decomposition of ammonium phosphate
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1539.0 | โ | โ | โ |
per 1 mol of | 1539.0 | โ | โ | โ |
per 1 mol of | 513.00 | โ | โ | โ |
1539.0 | โ | โ | โ | |
769.50 | โ | โ | โ |
Changes in aqueous solution (1)
- Decomposition of ammonium phosphateโ
ฮrG 1220.7 kJ/mol K 0.14 ร 10โ213 pK 213.86
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1542.0 | 1220.7 | 1081 | โ |
per 1 mol of | 1542.0 | 1220.7 | 1081 | โ |
per 1 mol of | 514.00 | 406.90 | 360.3 | โ |
1542.0 | 1220.7 | 1081 | โ | |
771.00 | 610.35 | 540.5 | โ |
Changes in aqueous solution (2)
- Decomposition of ammonium phosphateโ
ฮrG 1253.5 kJ/mol K 0.25 ร 10โ219 pK 219.60
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1518.6 | 1253.5 | 892 | โ |
per 1 mol of | 1518.6 | 1253.5 | 892 | โ |
per 1 mol of | 506.20 | 417.83 | 297 | โ |
1518.6 | 1253.5 | 892 | โ | |
759.30 | 626.75 | 446 | โ |
Changes in aqueous solution (3)
- Decomposition of ammonium phosphateโ
ฮrG 1232.6 kJ/mol K 0.11 ร 10โ215 pK 215.94
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1527.1 | 1232.6 | 991 | โ |
per 1 mol of | 1527.1 | 1232.6 | 991 | โ |
per 1 mol of | 509.03 | 410.87 | 330 | โ |
1527.1 | 1232.6 | 991 | โ | |
763.55 | 616.30 | 496 | โ |
Changes in aqueous solution (4)
- Decomposition of ammonium phosphateโ
ฮrG 1265.4 kJ/mol K 0.20 ร 10โ221 pK 221.69
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1503.7 | 1265.4 | 802 | โ |
per 1 mol of | 1503.7 | 1265.4 | 802 | โ |
per 1 mol of | 501.23 | 421.80 | 267 | โ |
1503.7 | 1265.4 | 802 | โ | |
751.85 | 632.70 | 401 | โ |
Changes in aqueous solution (5)
- Decomposition of ammonium phosphateโ
ฮrG 1190.5 kJ/mol K 0.27 ร 10โ208 pK 208.57
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1439.4 | 1190.5 | 837 | โ |
per 1 mol of | 1439.4 | 1190.5 | 837 | โ |
per 1 mol of | 479.80 | 396.83 | 279 | โ |
1439.4 | 1190.5 | 837 | โ | |
719.70 | 595.25 | 419 | โ |
Changes in aqueous solution (6)
- Decomposition of ammonium phosphateโ
ฮrG 1223.3 kJ/mol K 0.49 ร 10โ214 pK 214.31
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1416.0 | 1223.3 | 649 | โ |
per 1 mol of | 1416.0 | 1223.3 | 649 | โ |
per 1 mol of | 472.00 | 407.77 | 216 | โ |
1416.0 | 1223.3 | 649 | โ | |
708.00 | 611.65 | 325 | โ |
Changes in aqueous solution (7)
- Decomposition of ammonium phosphateโ
ฮrG 1202.5 kJ/mol K 0.21 ร 10โ210 pK 210.67
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1424.5 | 1202.5 | 747 | โ |
per 1 mol of | 1424.5 | 1202.5 | 747 | โ |
per 1 mol of | 474.83 | 400.83 | 249 | โ |
1424.5 | 1202.5 | 747 | โ | |
712.25 | 601.25 | 374 | โ |
Changes in aqueous solution (8)
- Decomposition of ammonium phosphateโ
ฮrG 1235.3 kJ/mol K 0.38 ร 10โ216 pK 216.42
Standard enthalpy of reaction ฮrHยฐ kJ ยท molโ1 | Standard Gibbs energy of reaction ฮrGยฐ kJ ยท molโ1 | Standard entropy of reaction ฮrSยฐ J ยท Kโ1 ยท molโ1 | Standard heat capacity of reaction at constant pressure ฮrCpยฐ J ยท Kโ1 ยท molโ1 | |
---|---|---|---|---|
per 1 mol of Equation | 1401.1 | 1235.3 | 559 | โ |
per 1 mol of | 1401.1 | 1235.3 | 559 | โ |
per 1 mol of | 467.03 | 411.77 | 186 | โ |
1401.1 | 1235.3 | 559 | โ | |
700.55 | 617.65 | 280 | โ |
Thermodynamic data of reactants
Chemical formula | Standard enthalpy of formation ฮfHยฐ kJ ยท molโ1 | Standard Gibbs energy of formation ฮfGยฐ kJ ยท molโ1 | Standard molar entropy Sยฐ J ยท Kโ1 ยท molโ1 | Standard molar heat capacity at constant pressure Cpยฐ J ยท Kโ1 ยท molโ1 |
---|---|---|---|---|
(NH4)3PO4 (cr) | -1671.9[1] | โ | โ | โ |
(NH4)3PO4 (ai) | -1674.9[1] | -1256.6[1] | 117[1] | โ |
(NH4)3PO4 (cr) 3 hydrate | -2555.6[1] | โ | โ | โ |
* (cr):Crystalline solid, (ai):Ionized aqueous solution
Thermodynamic data of products
Chemical formula | Standard enthalpy of formation ฮfHยฐ kJ ยท molโ1 | Standard Gibbs energy of formation ฮfGยฐ kJ ยท molโ1 | Standard molar entropy Sยฐ J ยท Kโ1 ยท molโ1 | Standard molar heat capacity at constant pressure Cpยฐ J ยท Kโ1 ยท molโ1 |
---|---|---|---|---|
NH3 (g) | -46.11[1] | -16.45[1] | 192.45[1] | 35.06[1] |
NH3 (ao) | -80.29[1] | -26.50[1] | 111.3[1] | โ |
(g) | 5.4[1] | 13.4[1] | 210.23[1] | 37.11[1] |
(ao) | -9.50[1] | 25.36[1] | 120.1[1] | โ |
(g) | 0[1] | 0[1] | 205.138[1] | 29.355[1] |
(ao) | -11.7[1] | 16.4[1] | 110.9[1] | โ |
* (g):Gas, (ao):Un-ionized aqueous solution
References
List of references
- 1Janiel J. Reed (1989)The NBS Tables of Chemical Thermodynamic Properties: Selected Values for Inorganic and C1 and C2 Organic Substances in SI UnitsNational Institute of Standards and Technology (NIST)
- ^ ฮfHยฐ, -1671.9 kJ ยท molโ1
- ^ ฮfHยฐ, -1674.9 kJ ยท molโ1
- ^ ฮfGยฐ, -1256.6 kJ ยท molโ1
- ^ Sยฐ, 117. J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -2555.6 kJ ยท molโ1
- ^ ฮfHยฐ, -46.11 kJ ยท molโ1
- ^ ฮfGยฐ, -16.45 kJ ยท molโ1
- ^ Sยฐ, 192.45 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 35.06 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -80.29 kJ ยท molโ1
- ^ ฮfGยฐ, -26.50 kJ ยท molโ1
- ^ Sยฐ, 111.3 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, 5.4 kJ ยท molโ1
- ^ ฮfGยฐ, 13.4 kJ ยท molโ1
- ^ Sยฐ, 210.23 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 37.11 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -9.50 kJ ยท molโ1
- ^ ฮfGยฐ, 25.36 kJ ยท molโ1
- ^ Sยฐ, 120.1 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, 0 kJ ยท molโ1
- ^ ฮfGยฐ, 0 kJ ยท molโ1
- ^ Sยฐ, 205.138 J ยท Kโ1 ยท molโ1
- ^ Cpยฐ, 29.355 J ยท Kโ1 ยท molโ1
- ^ ฮfHยฐ, -11.7 kJ ยท molโ1
- ^ ฮfGยฐ, 16.4 kJ ยท molโ1
- ^ Sยฐ, 110.9 J ยท Kโ1 ยท molโ1