Carbon monoxide Thermodynamic properties

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

Calculate a state of Carbon monoxide Open it in the Worksheet

Constants

Formula: CO
Also known as: CO, CARBONMONOXIDE
CAS: 630-08-0
Molar mass: 28.01 g/mol
Normal boiling point (1 atm): -191.51 °C (81.638 K)
Critical temperature: -140.29 °C (132.86 K)
Critical pressure: 3.4982 MPa
Critical density: 303.91 kg/m³
Triple point: -204.99 °C, 15.537 kPa
Acentric factor: 0.0497
Valid up to: 226.85 °C, 100 MPa

Saturation table

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

Saturated Carbon monoxide, 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)
-200	34.038	0.001206	0.62597	-18.22	225.82	207.6	-0.23458	2.8525
-195	66.806	0.0012372	0.33661	-7.4969	219.4	211.91	-0.09331	2.7142
-190	119.94	0.0012713	0.19621	3.2602	212.56	215.82	0.039283	2.5956
-185	200.36	0.0013089	0.12185	14.119	205.14	219.26	0.16489	2.4921
-180	315.58	0.0013509	0.079543	25.153	196.98	222.13	0.28494	2.3996
-175	473.49	0.0013983	0.053994	36.445	187.88	224.33	0.40073	2.315
-170	682.31	0.001453	0.03777	48.095	177.62	225.72	0.51354	2.2355
-165	950.53	0.0015175	0.027011	60.235	165.89	226.12	0.62468	2.1586
-160	1287	0.0015958	0.019593	73.053	152.22	225.27	0.73578	2.0811
-155	1701.4	0.0016955	0.014286	86.848	135.88	222.73	0.84915	1.9992
-150	2204.4	0.0018322	0.010326	102.19	115.41	217.61	0.96895	1.9061
-145	2810.3	0.0020533	0.0071659	120.62	86.964	207.58	1.1062	1.7848

Saturation table by pressure

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

Saturated Carbon monoxide, 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)
20	-203.47	0.0011857	1.0211	-25.675	230.1	204.43	-0.33875	2.9634
30	-200.86	0.0012009	0.70306	-20.063	226.89	206.83	-0.25985	2.8787
50	-197.24	0.0012229	0.43948	-12.299	222.32	210.02	-0.15539	2.7733
100	-191.63	0.0012599	0.2321	-0.24869	214.84	214.6	-0.0030279	2.6323
200	-185.02	0.0013088	0.12206	14.078	205.17	219.25	0.16443	2.4924
300	-180.59	0.0013457	0.08344	23.847	197.98	221.83	0.27109	2.41
500	-174.29	0.0014057	0.051223	38.084	186.5	224.58	0.417	2.3034
1000	-164.19	0.001529	0.025627	62.253	163.83	226.08	0.64257	2.1462
2000	-151.92	0.0017736	0.011724	96.058	123.91	219.97	0.92177	1.9439
3000	-143.61	0.0021518	0.0063434	126.96	75.994	202.95	1.1523	1.7389

Diagrams

p–h diagram of Carbon monoxide, with isotherms

T–s diagram of Carbon monoxide, with isobars

Superheated vapor table

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

Superheated Carbon monoxide at 20 kPa (Tsat -203.47 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	1.0211	184.01	204.43	2.9634
-200	1.0738	186.65	208.12	3.0152
-180	1.3752	201.69	229.2	3.2699
-160	1.6743	216.62	250.11	3.4733
-140	1.9725	231.51	270.96	3.643
-120	2.2702	246.38	291.79	3.7888
-100	2.5677	261.25	312.6	3.9165
-80	2.865	276.11	333.41	4.0302

Superheated Carbon monoxide at 50 kPa (Tsat -197.24 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.43948	188.05	210.02	2.7733
-180	0.5456	201.27	228.55	2.9934
-160	0.66663	216.34	249.67	3.1988
-140	0.78673	231.29	270.63	3.3694
-120	0.90637	246.21	291.53	3.5156
-100	1.0258	261.1	312.39	3.6437
-80	1.145	275.98	333.23	3.7576

Superheated Carbon monoxide at 100 kPa (Tsat -191.63 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.2321	191.39	214.6	2.6323
-180	0.269	200.55	227.45	2.7798
-160	0.33072	215.85	248.92	2.9887
-140	0.39147	230.93	270.08	3.1609
-120	0.45176	245.92	291.09	3.308
-100	0.51179	260.86	312.04	3.4365
-80	0.57165	275.77	332.94	3.5507

Superheated Carbon monoxide at 200 kPa (Tsat -185.02 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.12206	194.84	219.25	2.4924
-180	0.13052	199.02	225.12	2.5573
-160	0.16272	214.86	247.4	2.7741
-140	0.19383	230.19	268.95	2.9496
-120	0.22445	245.33	290.22	3.0983
-100	0.2548	260.37	311.33	3.2279
-80	0.28498	275.35	332.35	3.3428

Superheated Carbon monoxide at 500 kPa (Tsat -174.29 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.051223	198.97	224.58	2.3034
-160	0.061721	211.65	242.51	2.473
-140	0.075178	227.88	265.47	2.66
-120	0.088041	243.51	287.53	2.8144
-100	0.1006	258.87	309.17	2.9473
-80	0.11298	274.08	330.57	3.0642

Superheated Carbon monoxide at 1 MPa (Tsat -164.19 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.025627	200.45	226.08	2.1462
-160	0.027583	205.1	232.69	2.2057
-140	0.035504	223.68	259.19	2.4219
-120	0.042534	240.34	282.87	2.5877
-100	0.049196	256.3	305.5	2.7266
-80	0.055657	271.91	327.57	2.8473

Superheated Carbon monoxide at 2 MPa (Tsat -151.92 °C)
T °C	v m³/kg	u kJ/kg	h kJ/kg	s kJ/(kg·K)
Sat.	0.011724	196.52	219.97	1.9439
-140	0.015326	213.32	243.97	2.1335
-120	0.0197	233.3	272.7	2.335
-100	0.023483	250.85	297.81	2.4893
-80	0.027007	267.43	321.44	2.6185

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