50% Sodium Hydroxide Specific Heat Capacity
Specific Heat Capacity Formula
Specific Heat Capacity Calculator

Formula: HNaO
Molecular weight: 39.9971
IUPAC Standard InChI:
InChI=1S/Na.H2O/h;1H2/q+1;/p-1
Download the identifier in a file.
IUPAC Standard InChIKey:HEMHJVSKTPXQMS-UHFFFAOYSA-M
CAS Registry Number: 1310-73-2
Chemical structure:
This structure is also available as a 2d Mol fileor as a computed3d SD file
The 3d structure may be viewed usingJavaorJavascript.
Species with the same structure:
Information on this page:
Data at other public NIST sites:
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The heat capacity of the calorimeter (C cal) is 78.2 J o C-1. The specific heat capacity of the aqueous solutions is 4.184 J o C-1 g-1. Repeat the experiment using various volumes of HCl and NaOH. You should get the same molar enthalpy of neutralization. Ammonia + water + sodium hydroxide and ammonia + water + potassium hydroxide mixtures were chosen as potential candidates for absorption chillers driven by low-temperature heat sources. Heat capacity and density were studied between (293.15 and 353.15) K at a constant pressure of 1.8 MPa for these solutions using a heat flux Calvet-type calorimeter and a vibrating-tube densimeter, respectively.

Data at NIST subscription sites:

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Gas phase thermochemistry data

Go To:Top, Condensed phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References, Notes

Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_gas	-197.76	kJ/mol	Review	Chase, 1998	Data last reviewed in December, 1970
Quantity	Value	Units	Method	Reference	Comment
S°_{gas,1 bar}	228.47	J/mol*K	Review	Chase, 1998	Data last reviewed in December, 1970

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 (J/mol*K)
H° = standard enthalpy (kJ/mol)
S° = standard entropy (J/mol*K)
t = temperature (K) / 1000.

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Temperature (K)	2500. - 6000.
A	49.46492
B	7.000125
C	-1.391757
D	0.095206
E	-0.256928
F	-213.6706
G	284.8609
H	-197.7572
Reference	Chase, 1998
Comment	Data last reviewed in December, 1970

Condensed phase thermochemistry data

Go To:Top, Gas phase thermochemistry data, Reaction thermochemistry data, Gas phase ion energetics data, References, Notes

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Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_liquid	-416.88	kJ/mol	Review	Chase, 1998	Data last reviewed in December, 1970
Quantity	Value	Units	Method	Reference	Comment
S°_{liquid,1 bar}	75.91	J/mol*K	Review	Chase, 1998	Data last reviewed in December, 1970
Quantity	Value	Units	Method	Reference	Comment
Δ_fH°_solid	-425.93	kJ/mol	Review	Chase, 1998	Data last reviewed in December, 1970
Quantity	Value	Units	Method	Reference	Comment
S°_solid	64.46	J/mol*K	Review	Chase, 1998	Data last reviewed in December, 1970

Liquid Phase Heat Capacity (Shomate Equation)

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Temperature (K)	596. - 2500.
A	88.34725
B	-2.495103
C	-3.013028
D	0.862607
E	0.042216
F	-442.9350
G	183.9320
H	-416.8783
Reference	Chase, 1998
Comment	Data last reviewed in December, 1970

Solid Phase Heat Capacity (Shomate Equation)

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Temperature (K)	298. - 572.	572. - 596.
A	419.4837	86.02304
B	-1717.754	0.000000
C	2953.573	0.000000
D	-1597.221	0.000000
E	-6

Sodium Hydroxide Specific Heat Capacity