n-Butane (R600) Thermodynamic properties

Saturation tables by temperature and by pressure, superheated vapor table, p–h and T–s diagrams and constants of n-Butane (C₄H₁₀), computed with CoolProp. Any other state of n-Butane, from any two properties, in the State Explorer or the Worksheet.

Calculate a state of n-Butane Open it in the Worksheet

Constants

Formula: C₄H₁₀
Also known as: nButane, butane, Butane, BUTANE, N-BUTANE, R600, NC4H10, n-C4H10
CAS: 106-97-8
Molar mass: 58.122 g/mol
Normal boiling point (1 atm): -0.49 °C (272.66 K)
Critical temperature: 151.98 °C (425.13 K)
Critical pressure: 3.796 MPa
Critical density: 228 kg/m³
Triple point: -138.25 °C, 0.00066566 kPa
Acentric factor: 0.20081
Valid up to: 301.85 °C, 12 MPa

Saturation table

By temperature: saturated liquid (f) and saturated vapor (g).

Saturated n-Butane, by temperature
T °C	Psat kPa	vf m³/kg	vg m³/kg	hf kJ/kg	hfg kJ/kg	hg kJ/kg	sf kJ/(kg·K)	sg kJ/(kg·K)
-120	0.013606	0.0013929	1610.2	-53.665	480.54	426.88	-0.21373	2.924
-100	0.1646	0.00143	150.44	-13.651	464.5	450.85	0.0318	2.7144
-80	1.1137	0.0014695	24.773	26.943	449.02	475.97	0.25363	2.5784
-60	5.012	0.0015119	6.0558	68.343	433.78	502.13	0.45751	2.4926
-40	16.792	0.0015579	1.9638	110.8	418.39	529.19	0.6478	2.4423
-20	45.213	0.0016084	0.78237	154.6	402.39	556.98	0.82778	2.4173
0	103.23	0.0016646	0.36275	200	385.27	585.27	1	2.4105
20	207.65	0.0017283	0.18823	247.3	366.5	613.8	1.1665	2.4167
40	378.49	0.0018021	0.10618	296.82	345.44	642.25	1.3288	2.4319
60	638.24	0.0018898	0.063659	348.91	321.28	670.19	1.4885	2.4529
80	1011.6	0.0019984	0.039783	404.06	292.88	696.94	1.6472	2.4765
100	1525.9	0.0021408	0.025412	463.03	258.26	721.29	1.8066	2.4987
120	2213.1	0.0023481	0.016146	527.34	213.35	740.69	1.9704	2.5131
140	3117.2	0.0027419	0.0095333	602.17	145.12	747.29	2.1502	2.5015

Saturation table by pressure

By pressure: saturated liquid (f) and saturated vapor (g).

Saturated n-Butane, by pressure
P kPa	Tsat °C	vf m³/kg	vg m³/kg	hf kJ/kg	hfg kJ/kg	hg kJ/kg	sf kJ/(kg·K)	sg kJ/(kg·K)
1	-81.269	0.0014669	27.412	24.347	449.99	474.34	0.24014	2.5853
2	-72.75	0.0014845	14.301	41.844	443.49	485.34	0.32935	2.5424
3	-67.347	0.001496	9.783	53.026	439.38	492.4	0.3844	2.5193
5	-60.036	0.0015119	6.0693	68.268	433.81	502.08	0.45716	2.4928
10	-49.087	0.0015365	3.1806	91.363	425.43	516.8	0.5628	2.4615
20	-36.737	0.0015658	1.6692	117.85	415.83	533.68	0.67779	2.4367
30	-28.747	0.0015857	1.1453	135.26	409.49	544.75	0.75015	2.4256
50	-17.742	0.0016144	0.71251	159.64	400.52	560.16	0.84757	2.4157
100	-0.836	0.0016622	0.37366	198.07	386.02	584.08	0.99293	2.4105
200	18.842	0.0017244	0.19503	244.51	367.64	612.15	1.157	2.416
300	31.911	0.0017708	0.13272	276.5	354.28	630.78	1.2636	2.4249
500	50.327	0.0018453	0.081016	323.37	333.41	656.78	1.4115	2.4422
1000	79.47	0.0019952	0.040267	402.55	293.7	696.26	1.6429	2.4759
2000	114.37	0.0022797	0.018398	508.54	227.44	735.98	1.9235	2.5104
3000	137.7	0.0026741	0.010228	592.51	155.41	747.91	2.1275	2.5058

Diagrams

p–h diagram of n-Butane, with isotherms

T–s diagram of n-Butane, with isobars

Superheated vapor table

At each pressure, from its saturated vapor (Sat.) to higher temperatures.

Superheated n-Butane at 20 kPa (Tsat -36.737 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	1.6692	500.3	533.68	2.4367
0	1.9385	551.01	589.78	2.657
50	2.3011	628.85	674.88	2.9426
100	2.6617	717.66	770.9	3.2185
150	3.0212	817.5	877.92	3.4874
200	3.3801	927.93	995.54	3.7499
250	3.7387	1048.3	1123.1	4.006
300	4.0971	1177.9	1259.9	4.2556

Superheated n-Butane at 50 kPa (Tsat -17.742 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.71251	524.53	560.16	2.4157
0	0.76609	549.89	588.2	2.5218
50	0.91427	628.14	673.85	2.8093
100	1.0603	717.15	770.16	3.0861
150	1.2052	817.11	877.37	3.3554
200	1.3496	927.62	995.1	3.6182
250	1.4936	1048.1	1122.7	3.8744
300	1.6373	1177.7	1259.6	4.1241

Superheated n-Butane at 100 kPa (Tsat -0.836 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.37366	546.72	584.08	2.4105
50	0.45188	626.91	672.1	2.7064
100	0.52642	716.29	768.93	2.9846
150	0.59986	816.45	876.44	3.2547
200	0.6727	927.1	994.37	3.5179
250	0.74519	1047.6	1122.1	3.7744
300	0.81745	1177.3	1259.1	4.0243

Superheated n-Butane at 200 kPa (Tsat 18.842 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.19503	573.15	612.15	2.416
50	0.22049	624.37	668.46	2.5992
100	0.25942	714.52	766.4	2.8807
150	0.29716	815.12	874.55	3.1524
200	0.33426	926.04	992.89	3.4165
250	0.37099	1046.8	1121	3.6736
300	0.40749	1176.6	1258.1	3.9239

Superheated n-Butane at 500 kPa (Tsat 50.327 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.081016	616.27	656.78	2.4422
100	0.098971	708.87	758.35	2.7341
150	0.11543	810.98	868.7	3.0114
200	0.13115	922.8	988.37	3.2785
250	0.14646	1044.1	1117.3	3.5374
300	0.16151	1174.4	1255.1	3.7889

Superheated n-Butane at 1 MPa (Tsat 79.47 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.040267	655.99	696.26	2.4759
100	0.044917	697.88	742.79	2.6041
150	0.054657	803.5	858.16	2.8941
200	0.063365	917.13	980.49	3.1672
250	0.071578	1039.5	1111.1	3.4295
300	0.079508	1170.6	1250.1	3.6831

Superheated n-Butane at 2 MPa (Tsat 114.37 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.018398	699.19	735.98	2.5104
150	0.023753	785.36	832.86	2.7498
200	0.029301	904.58	963.18	3.0409
250	0.034077	1029.9	1098	3.3116
300	0.038488	1162.7	1239.6	3.5701

Enthalpy and entropy are measured from n-Butane's own reference state (CoolProp's default). The textbooks' refrigerant tables use ASHRAE's: in the Worksheet, write reference ASHRAE.