Ammonia - Properties at Gas-Liquid Equilibrium Conditions

Figures and tables showing how the properties of liquid and gaseous ammonia changes along the boiling/condensation curve (temperature and pressure between triple point and critical point conditions). An ammonia phase diagram are included.

At standard conditions, ammonia is a gas. However, at low temperature and/or high pressures the gas becomes a liquid, and at more extreme conditions, a solid. The ammonia phase diagram shows the phase behavior with changes in temperature and pressure. The curve between the triple point and the critical point shows the ammonia boiling point with changes in pressure.

Critical point : The end point of the pressure-temperature curve that designates conditions under which a liquid and its vapor can coexist. At higher temperatures, the gas cannot be liquefied by pressure alone. At the critical point, defined by the critical temperature T_c and the critical pressure P_c, phase boundaries vanish.
Critical temperature of ammonia: 405.56 K = 132.41 °C = 270.34 °F
Critical pressure of ammonia: 112.08 atm = 113.41 bar = 11.357 MPa (MN/m²) = 1647.2 psi (lb_f/in²)

Triple point : The temperature and pressure at which the three phases (gas, liquid, and solid) of a substance coexist in thermodynamic equilibrium
Triple point pressure of ammonia: 0.0601 atm = 0.0609 bar = 6090 Pa = 0.8832 psi (=lb_f/in²)
Triple point temperature of ammonia: 195.5 K = -77.65 °C = -107.77 °F

The figures below show the changes in thermophysical properties along the ammonia boiling and condensation curves: Density, viscosity, heat capacity, thermal conductivity.

Tabulated values given in SI and imperial units, and unit converters are given below the figures.

See also properties of Ammonia at varying temperature and pressure: Density and specific weight, Dynamic and kinematic viscosity, Prandtl Number, Specific Heat (Heat Capacity) and Thermal Conductivity, and Thermophysical properties at standard conditions and Vapour pressure at gas-liquid equilibrium,

Phase diagram of ammonia:
/Ammonia phase diagram C

The following figures show how the properties of ammonia change along the boiling and condensation curves (shown in the phase diagram above) - SI units:

Ammonia density temperature saturation C Ammonia dynamic viscosity temperature saturation C
Ammonia kinematic viscosity temperature saturation C
Ammonia heat capacity temperature saturation C

Ammonia thermal conductivity temperature saturation C

Properties of ammonia along the boiling/condensation curve, SI units:

For full table with Specific Weight, Specific Heat, Thermal Conductivity, Dynematic and Kinematic Viscosity - rotate the screen!

Ammonia - Properties at Gas-Liquid Equilibrium Conditions - SI units
Temperature		Pressure		Density	Specific weight	Cv	Cp	Thermal conductivity		Dynamic Viscosity	Kinematic vicosity
(K)	(°C)	(MPa)	(bara)	(g/l), (kg/m³)	(N/m³)	(kJ/kg K)	(kJ/kg K)	(mW/m K)	(kcal(IT)/(h m K))	(µPa s)	(cSt), (m²/s ×10^-6)
Liquid
195.5	-77.7	0.006091	0.06091	732.9	7188	2.9342	4.2020	818.99	0.70420	559.57	0.76347
210	-63.2	0.0177	0.1774	717.2	7033	2.9077	4.2846	768.02	0.66038	414.98	0.57862
220	-53.2	0.0338	0.3379	705.8	6922	2.8893	4.3421	733.17	0.63041	346.68	0.49119
230	-43.2	0.0604	0.6041	694.0	6806	2.8716	4.3969	698.80	0.60086	294.94	0.42500
240	-33.2	0.1022	1.022	681.8	6686	2.8544	4.4486	665.09	0.57187	254.85	0.37380
250	-23.2	0.1649	1.649	669.2	6563	2.8376	4.4982	632.16	0.54356	223.08	0.33336
270	-3.2	0.3811	3.811	642.9	6305	2.8051	4.5991	568.85	0.48912	176.06	0.27386
290	16.9	0.7774	7.774	614.8	6029	2.7753	4.7215	508.99	0.43765	142.74	0.23216
300	26.9	1.062	10.62	600.0	5884	2.7620	4.8000	480.30	0.41298	129.30	0.21550
310	36.9	1.424	14.24	584.5	5732	2.7512	4.8964	452.23	0.38885	117.49	0.20101
320	46.9	1.873	18.73	568.2	5572	2.7430	5.0180	424.80	0.36526	106.90	0.18814
330	56.9	2.421	24.21	551.0	5403	2.7383	5.1756	397.96	0.34218	97.33	0.17665
350	76.9	3.866	38.66	512.4	5025	2.7460	5.6706	345.32	0.29692	80.43	0.15696
370	96.9	5.878	58.78	465.3	4563	2.7960	6.7142	293.07	0.25199	65.49	0.14075
390	116.9	8.605	86.05	399.6	3919	2.9546	10.3047	239.65	0.20606	50.88	0.12731
400	126.9	10.31	103.1	344.6	3379	3.1771	22.7274	216.00	0.18573	41.80	0.12132
405.4	132.3	11.34	113.4	225.0	2207
Gas
195.5	-77.7	0.006091	0.06091	0.0641	0.6286	1.5566	2.0627	19.636	0.016884	6.8396	106.71
210	-63.2	0.01774	0.1774	0.1746	1.712	1.5885	2.1115	19.860	0.017077	7.2115	41.315
220	-53.2	0.03379	0.3379	0.3188	3.127	1.6196	2.1598	20.132	0.017310	7.4846	23.475
230	-43.2	0.06041	0.6041	0.5486	5.380	1.6584	2.2210	20.503	0.017629	7.7679	14.159
240	-33.2	0.1022	1.022	0.8970	8.796	1.7053	2.2983	20.978	0.018038	8.0587	8.9843
250	-23.2	0.1649	1.649	1.404	13.77	1.7602	2.3914	21.560	0.018538	8.3552	5.9525
270	-3.1	0.3811	3.811	3.087	30.27	1.8938	2.6340	23.079	0.019844	8.9595	2.9023
290	16.9	0.7744	7.744	6.074	59.56	2.0567	2.9669	25.138	0.021615	9.5771	1.5768
300	26.9	1.062	10.62	8.251	80.91	2.1480	3.1770	26.410	0.022709	9.894	1.1991
310	36.9	1.424	14.24	11.02	108.1	2.2456	3.4233	27.872	0.023966	10.220	0.9275
320	46.9	1.873	18.73	14.51	142.3	2.3490	3.7180	29.570	0.025426	10.560	0.7278
330	56.9	2.421	24.21	18.89	185.3	2.4583	4.0774	31.559	0.027136	10.927	0.5783
350	76.9	3.866	38.66	31.34	307.3	2.6983	5.1248	36.900	0.031728	11.792	0.3763
370	96.9	5.878	58.78	51.73	507.3	2.9795	7.2139	46.149	0.039681	13.053	0.2523
390	116.9	8.605	86.05	90.23	884.8	3.3443	14.192	70.114	0.060287	15.527	0.1721
400	126.9	10.31	103.1	131.1	1286	3.5982	34.923	113.540	0.097627	18.529	0.1413
405.4	132.3	11.33	113.3	225.0	2207

Properties of ammonia along the boiling/condensation curve, Imperial units:

For full table with Specific Weight, Specific Heat, Thermal Conductivity, Dynematic and Kinematic Viscosity - rotate the screen!

Ammonia - Properties at Gas-Liquid Equilibrium Conditions - Imperial units
Temperature		Pressure	Density		Specific weight	Cv	Cp	Thermal conductivity	Dynamic viscosity		Kinematic viscosity
(K)	(°F)	(psia)	(lb/ft³)	(sl/ft³ ×10^-3)	(lb_f/ft³)	(Btu(IT)/lb K)	(Btu(IT)/lb K)	(Btu(IT)/(h ft °F))	(lb_f s/ft² ×10^-6)	(lb_m s/ft s ×10^-6)	(ft²/s ×10^-6)
Liquid
195.5	-107.8	0.8835	45.76	1422	45.76	0.70081	1.0036	0.47320	11.687	376.01	8.2179
210	-81.7	2.573	44.77	1392	44.77	0.69449	1.0234	0.44375	8.6670	278.85	6.2282
220	-63.7	4.901	44.06	1369	44.06	0.69009	1.0371	0.42362	7.2406	232.96	5.2871
230	-45.7	8.761	43.32	1347	43.32	0.68586	1.0502	0.40376	6.1599	198.19	4.5746
240	-27.7	14.83	42.56	1323	42.56	0.68176	1.0625	0.38428	5.3227	171.25	4.0235
250	-9.7	23.92	41.78	1298	41.78	0.67774	1.0744	0.36526	4.6591	149.90	3.5882
270	26.3	55.27	40.13	1247	40.13	0.66999	1.0985	0.32868	3.6771	118.31	2.9478
290	62.3	112.8	38.38	1193	38.38	0.66286	1.1277	0.29409	2.9812	95.92	2.4989
300	80.3	154.0	37.46	1164	37.46	0.65969	1.1465	0.27751	2.7005	86.89	2.3196
310	98.3	206.5	36.49	1134	36.49	0.65711	1.1695	0.26129	2.4538	78.95	2.1636
320	116.3	271.6	35.47	1102	35.47	0.65515	1.1985	0.24544	2.2327	71.83	2.0251
330	134.3	351.1	34.39	1069	34.39	0.65403	1.2362	0.22994	2.0327	65.40	1.9014
350	170.3	560.7	31.99	994.2	31.99	0.65587	1.3544	0.19952	1.6798	54.05	1.6895
370	206.3	852.5	29.05	902.8	29.05	0.66782	1.6037	0.16933	1.3678	44.01	1.5151
390	242.3	1248	24.95	775.4	24.95	0.70568	2.4612	0.13847	1.0626	34.19	1.3703
400	260.3	1495	21.51	668.6	21.51	0.75883	5.4283	0.12480	0.8731	28.09	1.3058
405.4	270.1	1645	14.05	436.6	14.05
Gas
195.5	-107.8	0.8835	0.00400	0.1244	0.00400	0.37178	0.49267	0.011345	0.14285	4.5960	1148.6
210	-81.7	2.573	0.01090	0.3387	0.01090	0.37939	0.50432	0.011475	0.15062	4.8459	444.71
220	-63.7	4.901	0.01990	0.6186	0.01990	0.38683	0.51585	0.011632	0.15632	5.0294	252.68
230	-45.7	8.761	0.03425	1.065	0.03425	0.39611	0.53048	0.011846	0.16224	5.2198	152.40
240	-27.7	14.83	0.05600	1.740	0.05600	0.40730	0.54893	0.012121	0.16831	5.4152	96.707
250	-9.7	23.92	0.08763	2.724	0.08763	0.42042	0.57117	0.012457	0.17450	5.6144	64.072
270	26.3	55.27	0.1927	5.990	0.1927	0.45232	0.62911	0.013335	0.18712	6.0205	31.240
290	62.3	112.3	0.3792	11.79	0.3792	0.49124	0.70864	0.014524	0.20002	6.4355	16.972
300	80.3	154.0	0.5151	16.01	0.5151	0.51304	0.75881	0.015259	0.20664	6.6485	12.907
310	98.3	206.5	0.6879	21.38	0.6879	0.53634	0.81763	0.016104	0.21345	6.8675	9.9830
320	116.3	271.6	0.9058	28.15	0.9058	0.56105	0.88803	0.017085	0.22055	7.0960	7.8337
330	134.3	351.1	1.180	36.66	1.180	0.58716	0.97388	0.018234	0.22822	7.3426	6.2250
350	170.3	560.7	1.956	60.80	1.956	0.64446	1.2240	0.021320	0.24628	7.9239	4.0506
370	206.3	852.5	3.230	100.4	3.229	0.71164	1.7230	0.026664	0.27262	8.7712	2.7160
390	242.3	1248	5.633	175.1	5.633	0.79877	3.3896	0.040511	0.32429	10.434	1.8523
400	260.3	1495	8.184	254.4	8.184	0.85941	8.3411	0.065602	0.38699	12.451	1.5214
405.4	270.1	1644	14.05	436.6	14.05

Unit converters:

Temperature unit converter
Pressure unit converter
Density unit converter
Specific heat (heat capacity) unit converter
Thermal conductivity unit converter
Dynamic viscosity unit converter
Kinematic viscosity unit converter