Sodium hydroxide

Formula: H₂Na₂O₂
Molecular weight: 79.9942
IUPAC Standard InChI: InChI=1S/Na.H2O/h;1H2/q+1;/p-1
IUPAC Standard InChIKey: HEMHJVSKTPXQMS-UHFFFAOYSA-M
CAS Registry Number: 54251-09-1
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.
Species with the same structure:
- Sodium hydroxide
Information on this page:
Other data available:
- Gas phase thermochemistry data
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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. - 1200.	1200. - 6000.
A	11.91310	27.00041
B	30.32770	2.415120
C	-22.33220	-0.453424
D	6.481590	0.029703
E	-0.017609	-2.896040
F	-149.9750	-159.6400
G	79.67930	97.38659
H	-145.2000	-145.2000
Reference	Chase, 1998	Chase, 1998
Comment	Data last reviewed in December, 1970	Data last reviewed in December, 1970

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.	18.94	73.46	73.47	-0.00
300.	18.98	73.59	73.47	0.03
400.	20.78	79.30	74.24	2.03
500.	22.23	84.10	75.74	4.18
600.	23.42	88.26	77.49	6.46
700.	24.39	91.95	79.30	8.86
800.	25.17	95.26	81.09	11.33
900.	25.82	98.26	82.83	13.89
1000.	26.37	101.0	84.51	16.50
1100.	26.86	103.5	86.13	19.16
1200.	27.34	105.9	87.68	21.87

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.	27.29	105.9	87.68	21.87
1300.	27.73	108.1	89.17	24.62
1400.	28.10	110.2	90.60	27.41
1500.	28.42	112.1	91.97	30.24
1600.	28.69	114.0	93.28	33.09
1700.	28.94	115.7	94.55	35.97
1800.	29.16	117.4	95.78	38.88
1900.	29.35	119.0	96.95	41.80
2000.	29.53	120.5	98.09	44.75
2100.	29.69	121.9	99.19	47.71
2200.	29.84	123.3	100.3	50.69
2300.	29.97	124.6	101.3	53.68
2400.	30.09	125.9	102.3	56.68
2500.	30.21	127.1	103.3	59.70
2600.	30.31	128.3	104.2	62.72
2700.	30.40	129.5	105.1	65.76
2800.	30.49	130.6	106.0	68.80
2900.	30.57	131.6	106.9	71.85
3000.	30.65	132.7	107.7	74.92
3100.	30.71	133.7	108.5	77.98
3200.	30.78	134.7	109.3	81.06
3300.	30.83	135.6	110.1	84.14
3400.	30.89	136.5	110.9	87.22
3500.	30.94	137.4	111.6	90.32
3600.	30.98	138.3	112.4	93.41
3700.	31.02	139.2	113.1	96.51
3800.	31.06	140.0	113.8	99.62
3900.	31.09	140.8	114.4	102.7
4000.	31.13	141.6	115.1	105.8
4100.	31.16	142.3	115.8	108.9
4200.	31.18	143.1	116.4	112.1
4300.	31.21	143.8	117.0	115.2
4400.	31.23	144.5	117.7	118.3
4500.	31.25	145.2	118.3	121.4
4600.	31.27	145.9	118.9	124.6
4700.	31.29	146.6	119.4	127.7
4800.	31.31	147.3	120.0	130.8
4900.	31.32	147.9	120.6	133.9
5000.	31.34	148.5	121.1	137.1
5100.	31.35	149.2	121.7	140.2
5200.	31.37	149.8	122.2	143.3
5300.	31.38	150.4	122.7	146.5
5400.	31.40	151.0	123.3	149.6
5500.	31.41	151.5	123.8	152.8
5600.	31.43	152.1	124.3	155.9
5700.	31.45	152.7	124.8	159.1
5800.	31.46	153.2	125.2	162.2
5900.	31.48	153.7	125.7	165.3
6000.	31.50	154.3	126.2	168.5

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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