T K		Vapor Pressure MPa	B(T) cm3·mol-1	dB/dT · T cm3·mol-1	C(T) cm6·mol-2	dC/dT · T cm6·mol-2	mW/(m·K)	µPa·s
Estimated Uncertainty	1%/0.1%	-	Gas densities are calculated to better than 0.1% over the temperature and pressure ranges of the reference.				5%	5%
Reference	[4]	-	[4]	[4]	[4]	-	[5]	[5]
200	3.72	-	-62.09	157.64	1296.94	-	14.1	17.8
210	3.70	-	-54.78	142.24	1296.94	-	14.6	18.5
220	3.69	-	-48.48	129.26	1296.94	-	15.1	19.3
230	3.68	-	-42.98	118.22	1296.94	-	15.6	20.1
240	3.66	-	-38.15	108.73	1296.94	-	16.2	20.8
250	3.65	-	-33.89	100.51	1296.94	-	16.7	21.6
260	3.64	-	-30.09	93.33	1296.94	-	17.2	22.3
270	3.63	-	-26.68	87.02	1296.94	-	17.7	23.1
280	3.62	-	-23.62	81.43	1296.94	-	18.2	23.8
290	3.62	-	-20.85	76.45	1296.94	-	18.7	24.6
300	3.61	-	-18.34	72.00	1296.94	-	19.1	25.3
310	3.60	-	-16.04	68.00	1296.94	-	19.6	26.0
320	3.60	-	-13.94	64.39	1296.94	-	20.1	26.8
330	3.60	-	-12.01	61.11	1296.94	-	20.6	27.5
340	3.59	-	-10.23	58.12	1296.94	-	21.1	28.2
350	3.59	-	-8.59	55.40	1296.94	-	21.6	28.9
360	3.59	-	-7.06	52.90	1296.94	-	22.0	29.7
370	3.59	-	-5.65	50.60	1296.94	-	22.5	30.4
380	3.59	-	-4.33	48.48	1296.94	-	23.0	31.1
390	3.59	-	-3.09	46.52	1296.94	-	23.4	31.8
400	3.59	-	-1.94	44.70	1296.94	-	23.9	32.5
410	3.59	-	-0.85	43.01	1296.94	-	24.3	33.2
420	3.59	-	0.16	41.44	1296.94	-	24.8	33.9
430	3.59	-	1.12	39.97	1296.94	-	25.3	34.6
440	3.60	-	2.02	38.59	1296.94	-	25.7	35.3
450	3.60	-	2.88	37.31	1296.94	-	26.1	36.0
460	3.60	-	3.68	36.10	1296.94	-	26.6	36.7
470	3.61	-	4.45	34.96	1296.94	-	27.0	37.4
480	3.61	-	5.17	33.89	1296.94	-	27.5	38.1
490	3.62	-	5.86	32.88	1296.94	-	27.9	38.8
500	3.62	-	6.51	31.93	1296.94	-	28.3	39.5
550	3.66	-	9.36	27.85	1296.94	-	30.4	42.9
600	3.69	-	11.64	24.67	1296.94	-	32.5	46.3
650	3.73	-	13.51	22.12	1296.94	-	34.4	49.7
700	3.77	-	15.07	20.03	1296.94	-	36.3	53.0
750	3.82	-	16.39	18.30	1296.94	-	38.1	56.3
800	3.86	-	17.52	16.83	1296.94	-	39.8	59.5
850	3.89	-	18.50	15.58	1296.94	-	41.4	62.8
900	3.93	-	19.36	14.50	1296.94	-	43.0	66.0
950	3.97	-	20.12	13.55	1296.94	-	44.5	69.2
1000	4.00	-	20.80	12.72	1296.94	-	45.9	72.3

References:

1. IUPAC; "Atomic Weights of the Elements 1999", J Phys Chem Ref Data 30:701 (2001).
2. E. F. Westrum, D. R. Stull, and G. C. Sinke, The Chemical Thermodynamics of Organic Compounds (John Wiley and Sons, New York, 1969).
3. J. F. Mathews, J.F, Chem. Rev. 72:71 (1972).
4. J. J. Hurly, Thermodynamic Properties of Nitrous Oxide and Nitric Oxide from Speed of Sound Measurements, Submitted to Int. J. Thermophys. Aug. 2003.
5. Thermophysical Properties of Matter (IFI/Plenum, New York, 1970. 13 Vols.).

Return to [Index | Fluid Metrology Group | Process Measurements Division | NIST Home | SEMI | NSMP ]

Last modified:6 May 2004.
Send comments to the webmaster at .