Dicarbon monoxide

Formula: C₂O
Molecular weight: 40.0208
IUPAC Standard InChI: InChI=1S/C2O/c1-2-3
IUPAC Standard InChIKey: VILAVOFMIJHSJA-UHFFFAOYSA-N
CAS Registry Number: 119754-08-4
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
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Species with the same structure:
- Dicarbon monoxide
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Gas Phase Heat Capacity (Shomate Equation)

C_p° = A + B*t + C*t² + D*t³ + E/t²
H° − H°_298.15= A*t + B*t²/2 + C*t³/3 + D*t⁴/4 − E/t + F − H
S° = A*ln(t) + B*t + C*t²/2 + D*t³/3 − E/(2*t²) + G
C_p = heat capacity (cal/mol*K)
H° = standard enthalpy (kcal/mol)
S° = standard entropy (cal/mol*K)
t = temperature (K) / 1000.

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Temperature (K)	298. to 1300.	1300. to 6000.
A	8.179840	14.49350
B	9.809771	1.031910
C	-5.623741	-0.265220
D	1.323441	0.019703
E	-0.030944	-1.925591
F	65.56850	60.32610
G	62.74240	68.36240
H	68.50010	68.50010
Reference	Chase, 1998	Chase, 1998
Comment	Data last reviewed in September, 1966	Data last reviewed in September, 1966

Temperature (K)	C_p (cal/mol*K)	S° (cal/mol*K)	-(G° - H°_298.15)/T (cal/mol*K)	H° - H°_298.15 (kcal/mol)
298.	10.29	55.70	55.70	-0.00
300.	10.31	55.77	55.70	0.02
400.	11.10	58.85	56.12	1.09
500.	11.72	61.39	56.93	2.23
600.	12.24	63.58	57.86	3.43
700.	12.68	65.50	58.81	4.68
800.	13.06	67.22	59.76	5.97
900.	13.38	68.77	60.67	7.29
1000.	13.66	70.20	61.56	8.64
1100.	13.90	71.51	62.40	10.02
1200.	14.12	72.73	63.21	11.42
1300.	14.32	73.87	63.99	12.84

Temperature (K)	C_p (cal/mol*K)	S° (cal/mol*K)	-(G° - H°_298.15)/T (cal/mol*K)	H° - H°_298.15 (kcal/mol)
1300.	14.29	73.87	63.99	12.84
1400.	14.49	74.93	64.73	14.28
1500.	14.66	75.94	65.45	15.74
1600.	14.79	76.89	66.13	17.21
1700.	14.91	77.79	66.79	18.70
1800.	15.01	78.64	67.43	20.19
1900.	15.10	79.46	68.04	21.70
2000.	15.17	80.24	68.63	23.21
2100.	15.24	80.98	69.20	24.73
2200.	15.29	81.69	69.75	26.26
2300.	15.34	82.37	70.29	27.79
2400.	15.38	83.02	70.80	29.33
2500.	15.42	83.65	71.30	30.87
2600.	15.45	84.26	71.79	32.41
2700.	15.47	84.84	72.26	33.95
2800.	15.49	85.40	72.72	35.50
2900.	15.51	85.95	73.17	37.05
3000.	15.52	86.47	73.60	38.60
3100.	15.53	86.98	74.03	40.16
3200.	15.54	87.47	74.44	41.71
3300.	15.54	87.95	74.84	43.26
3400.	15.54	88.42	75.23	44.82
3500.	15.54	88.87	75.62	46.37
3600.	15.54	89.30	75.99	47.93
3700.	15.54	89.73	76.36	49.48
3800.	15.53	90.14	76.71	51.03
3900.	15.53	90.55	77.06	52.59
4000.	15.52	90.94	77.41	54.14
4100.	15.51	91.32	77.74	55.69
4200.	15.50	91.70	78.07	57.24
4300.	15.49	92.06	78.39	58.79
4400.	15.48	92.42	78.70	60.34
4500.	15.47	92.77	79.01	61.89
4600.	15.46	93.11	79.32	63.43
4700.	15.44	93.44	79.61	64.98
4800.	15.43	93.76	79.90	66.52
4900.	15.42	94.08	80.19	68.06
5000.	15.41	94.39	80.47	69.61
5100.	15.40	94.70	80.75	71.15
5200.	15.39	95.00	81.02	72.68
5300.	15.38	95.29	81.29	74.22
5400.	15.37	95.58	81.55	75.76
5500.	15.36	95.86	81.80	77.30
5600.	15.35	96.14	82.06	78.83
5700.	15.35	96.41	82.31	80.37
5800.	15.34	96.67	82.55	81.90
5900.	15.34	96.94	82.79	83.44
6000.	15.34	97.19	83.03	84.97

References

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes

Chase, 1998
Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Notes

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), References

Data from NIST Standard Reference Database 69: NIST Chemistry WebBook
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