Ammonia - NH3 - Thermodynamic Properties
Thermodynamic properties of saturated and superheated ammonia R-717 like specific volume, enthalpy and entropy.
Specific volume (v), specific internal energy (u), enthalpy (h), and entropy (s) of saturated and superheated ammonia - NH3 - also known as refrigerant 717.
For full table with Specific Entropy and Superheated Properties - rotate the screen!
| Saturated Properties | Superheated Properties (t - ts) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Temperature - ts - (oC) | Pressure - ps - (bar) | Specific Volume - vi - (m3/kg) | Specific Enthalpy | Specific Entropy | Abs. Temperature (50 K) | Abs. Temperature (100 K) | ||||
| saturated liquid - hf - (kJ/kg) | saturated vapor - hg - (kJ/kg) | saturated liquid - sf - (kJ/kgK) | saturated vapor - sg - (kJ/kgK) | Specific Enthalpy - h - (kJ/kg) | Specific Entropy - s - (kJ/kgK) | Specific Enthalpy - h - (kJ/kg) | Specific Entropy - s - (kJ/kgK) | |||
| -50 | 0.4089 | 2.625 | -44.4 | 1373.3 | -0.194 | 6.159 | 1479.8 | 6.592 | 1585.9 | 6.948 |
| -45 | 0.5454 | 2.005 | -22.3 | 1381.6 | -0.096 | 6.057 | 1489.3 | 6.486 | 1596.1 | 6.839 |
| -40 | 0.7177 | 1.552 | 0 | 1390.0 | 0 | 5.962 | 1498.6 | 6.387 | 1606.3 | 6.736 |
| -35 | 0.9322 | 1.216 | 22.3 | 1397.9 | 0.095 | 5.872 | 1507.9 | 6.293 | 1616.3 | 6.639 |
| -30 | 1.196 | 0.9633 | 44.7 | 1405.6 | 0.188 | 5.785 | 1517.0 | 6.203 | 1626.3 | 6.547 |
| -28 | 1.317 | 0.8809 | 53.6 | 1408.5 | 0.224 | 5.751 | 1520.7 | 6.169 | 1630.3 | 6.512 |
| -26 | 1.447 | 0.8058 | 62.6 | 1411.4 | 0.261 | 5.718 | 1524.3 | 6.135 | 1634.2 | 6.477 |
| -24 | 1.588 | 0.7389 | 71.7 | 1414.3 | 0.297 | 5.686 | 1527.9 | 6.103 | 1638.2 | 6.444 |
| -22 | 1.740 | 0.6783 | 80.8 | 1417.3 | 0.333 | 5.655 | 1531.4 | 6.071 | 1642.2 | 6.411 |
| -20 | 1.902 | 0.6237 | 89.8 | 1420.0 | 0.368 | 5.623 | 1534.8 | 6.039 | 1646.0 | 6.379 |
| -18 | 2.077 | 0.5743 | 98.8 | 1422.7 | 0.404 | 5.593 | 1538.2 | 6.008 | 1650.0 | 6.347 |
| -16 | 2.265 | 0.5296 | 107.9 | 1425.3 | 0.440 | 5.563 | 1541.7 | 5.978 | 1653.8 | 6.316 |
| -14 | 2.465 | 0.4890 | 117.0 | 1427.9 | 0.475 | 5.533 | 1545.1 | 5.948 | 1657.7 | 6.286 |
| -12 | 2.680 | 0.4521 | 126.2 | 1430.5 | 0.510 | 5.504 | 1548.5 | 5.919 | 1661.5 | 6.256 |
| -10 | 2.908 | 0.4185 | 135.4 | 1433.0 | 0.544 | 5.475 | 1551.7 | 5.891 | 1665.3 | 6.227 |
| -8 | 3.153 | 0.3879 | 144.5 | 1435.3 | 0.579 | 5.447 | 1554.9 | 5.863 | 1669.0 | 6.199 |
| -6 | 3.413 | 0.3599 | 153.6 | 1437.6 | 0.613 | 5.419 | 1558.2 | 5.836 | 1672.8 | 6.171 |
| -4 | 3.691 | 0.3344 | 162.8 | 1439.9 | 0.647 | 5.392 | 1561.4 | 5.808 | 1676.4 | 6.143 |
| -2 | 3.983 | 0.3110 | 172.0 | 1442.2 | 0.681 | 5.365 | 1564.6 | 5.782 | 1680.1 | 6.116 |
| 0 | 4.295 | 0.2895 | 181.2 | 1444.4 | 0.715 | 5.340 | 1567.8 | 5.756 | 1683.9 | 6.090 |
| 2 | 4.625 | 0.2699 | 190.4 | 1446.5 | 0.749 | 5.314 | 1570.9 | 5.731 | 1687.5 | 6.065 |
| 4 | 4.975 | 0.2517 | 199.7 | 1448.5 | 0.782 | 5.288 | 1574.0 | 5.706 | 1691.2 | 6.040 |
| 6 | 5.346 | 0.2351 | 209.1 | 1450.6 | 0.816 | 5.263 | 1577.0 | 5.682 | 1694.9 | 6.015 |
| 8 | 5.736 | 0.2198 | 218.5 | 1452.5 | 0.849 | 5.238 | 1580.1 | 5.658 | 1698.4 | 5.991 |
| 10 | 6.149 | 0.2056 | 227.8 | 1454.3 | 0.881 | 5.213 | 1583.1 | 5.634 | 1702.2 | 5.967 |
| 12 | 6.585 | 0.1926 | 237.2 | 1456.1 | 0.914 | 5.189 | 1586.0 | 5.611 | 1705.7 | 5.943 |
| 14 | 7.045 | 0.1805 | 246.6 | 1457.8 | 0.947 | 5.165 | 1588.9 | 5.588 | 1709.1 | 5.920 |
| 16 | 7.529 | 0.1693 | 256.0 | 1459.5 | 0.979 | 5.141 | 1591.7 | 5.565 | 1712.5 | 5.898 |
| 18 | 8.035 | 0.1590 | 265.5 | 1461.1 | 1.012 | 5.118 | 1594.4 | 5.543 | 1715.9 | 5.876 |
| 20 | 8.570 | 0.1494 | 275.1 | 1462.6 | 1.044 | 5.095 | 1597.2 | 5.521 | 1719.3 | 5.854 |
| 22 | 9.134 | 0.1405 | 284.6 | 1463.9 | 1.076 | 5.072 | 1600.0 | 5.499 | 1722.8 | 5.832 |
| 24 | 9.722 | 0.1322 | 294.1 | 1465.2 | 1.108 | 5.049 | 1602.7 | 5.478 | 1726.3 | 5.811 |
| 26 | 10.34 | 0.1245 | 303.7 | 1466.5 | 1.140 | 5.027 | 1605.3 | 5.458 | 1729.6 | 5.790 |
| 28 | 10.99 | 0.1173 | 313.4 | 1467.8 | 1.172 | 5.005 | 1608.0 | 5.437 | 1732.7 | 5.770 |
| 30 | 11.67 | 0.1106 | 323.1 | 1468.9 | 1.204 | 4.984 | 1610.5 | 5.417 | 1735.9 | 5.750 |
| 32 | 12.37 | 0.1044 | 332.8 | 1469.9 | 1.235 | 4.962 | 1613.0 | 5.397 | 1739.3 | 5.731 |
| 34 | 13.11 | 0.0986 | 342.5 | 1470.8 | 1.267 | 4.940 | 1615.4 | 5.378 | 1742.6 | 5.711 |
| 36 | 13.89 | 0.0931 | 352.3 | 1471.8 | 1.298 | 4.919 | 1617.8 | 5.358 | 1745.7 | 5.692 |
| 38 | 14.70 | 0.0880 | 362.1 | 1472.6 | 1.329 | 4.898 | 1620.1 | 5.340 | 1748.7 | 5.674 |
| 40 | 15.54 | 0.0833 | 371.9 | 1473.3 | 1.360 | 4.877 | 1622.4 | 5.321 | 1751.9 | 5.655 |
| 42 | 16.42 | 0.0788 | 381.8 | 1473.8 | 1.391 | 4.856 | 1624.6 | 5.302 | 1755.0 | 5.637 |
| 44 | 17.34 | 0.0746 | 391.8 | 1474.2 | 1.422 | 4.835 | 1626.8 | 5.284 | 1758.0 | 5.619 |
| 46 | 18.30 | 0.0706 | 401.8 | 1474.5 | 1.453 | 4.814 | 1629.0 | 5.266 | 1761.0 | 5.602 |
| 48 | 19.29 | 0.0670 | 411.9 | 1474.7 | 1.484 | 4.793 | 1631.1 | 5.248 | 1764.0 | 5.584 |
| 50 | 20.33 | 0.0635 | 421.9 | 1474.7 | 1.515 | 4.773 | 1633.1 | 5.230 | 1766.8 | 5.567 |
- Ammonia Molecular weight : 17.03 g/mol
- Ammonia Melting point : -78 oC
- Ammonia Latent heat of fusion (1,013 bar, at triple point) : 331.37 kJ/kg
- Ammonia Liquid Density (1.013 bar at boiling point) : 682 kg/m3 (250 K : 669 kg/m3) (300 K : 600 kg/m3) (400 K : 346 kg/m3)
- Ammonia Liquid Specific Heat (cp) (250 K : 4.52 kJ/kg.K) (300 K : 4.75 kJ/kg.K) (400 K : 6.91 kJ/kg.K)
- Ammonia Liquid/gas equivalent (1.013 bar and 15 oC (59 oF)) : 947 vol/vol
- Ammonia Liquid Dynamic (Absolute) Viscosity (223K (-50 oC): 3.061×10-4 Ns/m2) (273K (0 oC): 2.388×10-4 Ns/m2) (323K (50 oC): 1.862×10-4 Ns/m2)
- Ammonia Liquid Thermal Conductivity (250 K : 592×106 kW/m.K) (300 K : 477×106 kW/m.K) (400 K : 207×106 kW/m.K)
- Ammonia Boiling point (1.013 bar) : -33.5 oC
- Ammonia Latent heat of vaporization (1.013 bar at boiling point) : 1371.2 kJ/kg
- Ammonia Vapor pressure (at 21 oC or 70 oF) : 8.88 bar
- Ammonia Critical point - Critical temperature : 132.4 oC - Critical pressure : 112.8 bar
- Ammonia Gas Density (1.013 bar at boiling point) : 0.86 kg/m3
- Ammonia Gas Density (1.013 bar and 15 oC (59 oF)) : 0.73 kg/m3
- Ammonia Gas Compressibility Factor (Z) (the ratio of the actual volume of the gas to the volume determined according to the perfect gas law) (1.013 bar and 15 oC (59 oF)) : 0.9929
- Ammonia Gas Specific Gravity (air = 1) (1.013 bar and 21 oC (70 oF)) : 0.597
- Ammonia Gas Specific volume (1.013 bar and 21 oC (70 oF)) : 1.411 m3/kg
- Ammonia Gas Specific Heat at constant pressure (cp) (1.013 bar and 15 oC (59 oF)) : 0.037 kJ/(mol.K)
- Ammonia Gas Specific Heat at constant volume (cv) (1.013 bar and 15 oC (59 oF)) : 0.028 kJ/(mol.K)
- Ammonia Gas Ratio of Specific Heats (Gamma: cp/cv) (1.013 bar and 15 oC (59 oF)) : 1.309623
- Ammonia Gas Dynamic Viscosity (1.013 bar and 0 oC (31 oF)) : 0.000098 Poise
- Ammonia Gas Thermal conductivity (1.013 bar and 0 oC (31 oF)) : 22.19 mW/(m.K)
- Ammonia Gas Solubility in water (1.013 bar and 0 oC (31 oF)) : 862 vol/vol
- Ammonia Gas Auto ignition temperature : 630 oC
