Magnesium monohydride

Formula: HMg
Molecular weight: 25.3129
IUPAC Standard InChI: InChI=1S/Mg.H
IUPAC Standard InChIKey: RZCHRULKKYOSQS-UHFFFAOYSA-N
CAS Registry Number: 14332-53-7
Chemical structure:
This structure is also available as a 2d Mol file or as a computed 3d SD file
The 3d structure may be viewed using Java or Javascript.
Permanent link for this species. Use this link for bookmarking this species for future reference.
Information on this page:
Other data available:
Data at other public NIST sites:
- Computational Chemistry Comparison and Benchmark Database
Options:
- Switch to SI units

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.

View plot Requires a JavaScript / HTML 5 canvas capable browser.

Temperature (K)	298. - 1200.	1200. - 6000.
A	4.663411	9.492271
B	7.730120	-0.244923
C	-5.248719	0.099833
D	1.339141	-0.002771
E	0.047494	-0.895502
F	38.86931	35.64501
G	50.00371	55.28719
H	40.40010	40.40010
Reference	Chase, 1998	Chase, 1998
Comment	Data last reviewed in December, 1966	Data last reviewed in December, 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.	7.07	46.17	46.18	-0.00
300.	7.07	46.22	46.18	0.01
400.	7.30	48.28	46.46	0.73
500.	7.57	49.94	46.99	1.47
600.	7.83	51.35	47.60	2.25
700.	8.06	52.57	48.23	3.04
800.	8.25	53.66	48.84	3.86
900.	8.40	54.64	49.43	4.69
1000.	8.53	55.53	50.00	5.54
1100.	8.64	56.35	50.54	6.39
1200.	8.73	57.11	51.05	7.26

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)
1200.	8.72	57.11	51.05	7.26
1300.	8.81	57.81	51.55	8.14
1400.	8.88	58.46	52.02	9.02
1500.	8.94	59.08	52.47	9.91
1600.	8.99	59.66	52.90	10.81
1700.	9.04	60.20	53.31	11.71
1800.	9.08	60.72	53.71	12.62
1900.	9.12	61.21	54.09	13.53
2000.	9.16	61.68	54.46	14.44
2100.	9.19	62.13	54.81	15.36
2200.	9.22	62.56	55.16	16.28
2300.	9.25	62.97	55.49	17.20
2400.	9.29	63.36	55.81	18.13
2500.	9.32	63.74	56.12	19.06
2600.	9.35	64.11	56.42	19.99
2700.	9.38	64.46	56.71	20.93
2800.	9.41	64.80	56.99	21.87
2900.	9.45	65.13	57.27	22.81
3000.	9.48	65.45	57.53	23.76
3100.	9.52	65.77	57.80	24.71
3200.	9.55	66.07	58.05	25.66
3300.	9.59	66.36	58.30	26.62
3400.	9.63	66.65	58.54	27.58
3500.	9.67	66.93	58.77	28.55
3600.	9.71	67.20	59.00	29.51
3700.	9.75	67.47	59.23	30.49
3800.	9.79	67.73	59.45	31.46
3900.	9.83	67.98	59.67	32.45
4000.	9.88	68.23	59.88	33.43
4100.	9.92	68.48	60.08	34.42
4200.	9.97	68.72	60.29	35.42
4300.	10.02	68.95	60.48	36.41
4400.	10.07	69.18	60.68	37.42
4500.	10.12	69.41	60.87	38.43
4600.	10.17	69.63	61.06	39.44
4700.	10.22	69.85	61.24	40.46
4800.	10.27	70.07	61.43	41.49
4900.	10.33	70.28	61.60	42.52
5000.	10.38	70.49	61.78	43.55
5100.	10.44	70.70	61.95	44.59
5200.	10.50	70.90	62.12	45.64
5300.	10.55	71.10	62.29	46.69
5400.	10.61	71.30	62.46	47.75
5500.	10.67	71.49	62.62	48.81
5600.	10.74	71.69	62.78	49.88
5700.	10.80	71.88	62.94	50.96
5800.	10.86	72.06	63.09	52.04
5900.	10.93	72.25	63.25	53.13
6000.	10.99	72.44	63.40	54.23

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
The National Institute of Standards and Technology (NIST) uses its best efforts to deliver a high quality copy of the Database and to verify that the data contained therein have been selected on the basis of sound scientific judgment. However, NIST makes no warranties to that effect, and NIST shall not be liable for any damage that may result from errors or omissions in the Database.
Customer support for NIST Standard Reference Data products.