sulfur trioxide Thermodynamic Properties vs Temperature (CAS 7446-11-9)

Analyze how thermophysical properties change over a temperature range at a constant pressure of 1 atm.

Related Calculators for sulfur trioxide

Pure Component Properties

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Properties vs. Pressure

Analyze properties at constant temperature.

Input Conditions

Define the chemical and range for the property profile.

Property Profile for sulfur trioxide

Calculated properties vs. Temperature

Profile Data

Equilibrium Thermodynamic and Transport Properties of sulfur trioxide at 1.01325 bar over -23.15–226.85 °C
Temperature (°C)	Specific heat capacity (kJ/kg·K)	Density (kg/m³)	Dynamic viscosity (cP)	Thermal conductivity (W/m·K)	Prandtl number ()	Molar volume (m³/kmol)	Specific enthalpy (kJ)	Specific entropy (kJ/kg·K)	Phase
-23.15	0.405614	2164.69	N/A	N/A	N/A	0.0369859	-21.5828	-0.0787294	s
-18.048	0.414523	2159.58	N/A	N/A	N/A	0.0370735	-19.4907	-0.0704452	s
-12.9459	0.423479	2154.47	N/A	N/A	N/A	0.0371614	-17.3529	-0.0621483	s
-7.84388	0.432482	2149.36	N/A	N/A	N/A	0.0372498	-15.1694	-0.0538381	s
-2.74184	0.441532	2144.25	N/A	N/A	N/A	0.0373386	-12.9398	-0.0455142	s
2.3602	0.45063	2139.14	N/A	N/A	N/A	0.0374278	-10.6639	-0.0371764	s
7.46224	0.459775	2134.02	N/A	N/A	N/A	0.0375175	-8.34142	-0.0288241	s
12.5643	0.468967	2128.91	N/A	N/A	N/A	0.0376076	-5.97221	-0.0204572	s
17.6663	0.478207	2123.8	N/A	N/A	N/A	0.0376981	-3.55596	-0.0120752	s
22.7684	0.487495	2118.69	N/A	N/A	N/A	0.037789	-1.09246	-0.00367789	s
27.8704	0.496831	2113.58	N/A	N/A	N/A	0.0378804	1.41856	0.00473507	s
32.9724	0.689703	1864.05	1.38014	0.202451	4.70181	0.0429511	112.271	0.372532	l
38.0745	0.699721	1839.67	1.16919	0.198023	4.13139	0.0435204	115.815	0.384016	l
43.1765	0.709537	1815.21	0.998583	0.193594	3.65988	0.0441068	119.411	0.395473	l
48.2786	0.65774	3.0355	0.0146016	0.0110026	0.87289	26.3756	631.709	2.00821	g
53.3806	0.662504	2.98807	0.0148279	0.0113272	0.867255	26.7942	635.077	2.01861	g
58.4827	0.667214	2.9421	0.0150533	0.0116546	0.861782	27.2129	638.469	2.02891	g
63.5847	0.671873	2.89753	0.0152776	0.0119849	0.856459	27.6316	641.885	2.03914	g
68.6867	0.676478	2.85428	0.015501	0.0123181	0.851272	28.0502	645.325	2.04927	g
73.7888	0.681032	2.81231	0.0157234	0.0126542	0.846211	28.4689	648.788	2.05933	g
78.8908	0.685533	2.77155	0.0159449	0.0129932	0.841266	28.8875	652.274	2.06931	g
83.9929	0.689982	2.73195	0.0161654	0.0133351	0.836427	29.3062	655.783	2.0792	g
89.0949	0.69438	2.69348	0.016385	0.0136799	0.831686	29.7249	659.315	2.08902	g
94.1969	0.698726	2.65607	0.0166036	0.0140276	0.827035	30.1435	662.869	2.09876	g
99.299	0.703022	2.61968	0.0168212	0.0143783	0.822467	30.5622	666.445	2.10843	g
104.401	0.707266	2.58428	0.0170379	0.0147319	0.817975	30.9808	670.042	2.11802	g
109.503	0.71146	2.54982	0.0172536	0.0150884	0.813555	31.3995	673.662	2.12754	g
114.605	0.715604	2.51627	0.0174684	0.015448	0.8092	31.8182	677.302	2.137	g
119.707	0.719698	2.48359	0.0176823	0.0158104	0.804906	32.2368	680.964	2.14638	g
124.809	0.723743	2.45175	0.0178952	0.0161759	0.800669	32.6555	684.646	2.15569	g
129.911	0.727738	2.42072	0.0181072	0.0165443	0.796485	33.0741	688.349	2.16493	g
135.013	0.731684	2.39046	0.0183183	0.0169158	0.79235	33.4928	692.072	2.17411	g
140.115	0.735582	2.36095	0.0185284	0.0172902	0.788262	33.9115	695.815	2.18323	g
145.217	0.739431	2.33216	0.0187377	0.0176675	0.784218	34.3301	699.578	2.19228	g
150.319	0.743233	2.30406	0.018946	0.0180479	0.780216	34.7488	703.36	2.20126	g
155.421	0.746986	2.27663	0.0191534	0.0184313	0.776253	35.1674	707.161	2.21019	g
160.523	0.750693	2.24984	0.0193599	0.0188176	0.772328	35.5861	710.982	2.21905	g
165.626	0.754353	2.22368	0.0195655	0.0192068	0.768438	36.0048	714.822	2.22785	g
170.728	0.757966	2.19812	0.0197702	0.019599	0.764584	36.4234	718.679	2.23659	g
175.83	0.761533	2.17315	0.019974	0.0199942	0.760763	36.8421	722.556	2.24527	g
180.932	0.765055	2.14873	0.0201769	0.0203923	0.756975	37.2607	726.45	2.2539	g
186.034	0.768531	2.12485	0.020379	0.0207932	0.753219	37.6794	730.362	2.26247	g
191.136	0.771962	2.1015	0.0205801	0.0211971	0.749493	38.0981	734.292	2.27098	g
196.238	0.775349	2.07866	0.0207804	0.0216038	0.745798	38.5167	738.239	2.27943	g
201.34	0.778692	2.05631	0.0209799	0.0220134	0.742133	38.9354	742.204	2.28783	g
206.442	0.781991	2.03443	0.0211785	0.0224258	0.738497	39.354	746.185	2.29618	g
211.544	0.785247	2.01302	0.0213762	0.022841	0.73489	39.7727	750.183	2.30447	g
216.646	0.78846	1.99205	0.0215731	0.0232589	0.731312	40.1914	754.198	2.31271	g
221.748	0.791631	1.97151	0.0217691	0.0236796	0.727762	40.61	758.229	2.3209	g
226.85	0.794759	1.9514	0.0219643	0.0241029	0.724241	41.0287	762.276	2.32903	g

Property Profiles for sulfur trioxide

Heat Capacity (Cp) vs Temperature

Density vs Temperature

Thermodynamic Property Profile at Constant Pressure

This page presents the temperature-dependent thermodynamic and transport properties of sulfur trioxide (CAS 7446-11-9) calculated at a constant pressure of 1 atm (101325 Pa) over the temperature range 250-500 K.

The properties shown - specific heat capacity (Cp), density (ρ), dynamic viscosity (μ), thermal conductivity (k), Prandtl number (Pr), molar volume (Vm), specific enthalpy (H), and specific entropy (S) - are among the most commonly used parameters in chemical engineering calculations, process simulation, and thermal system design.

All values are generated programmatically using validated thermodynamic correlations and equations of state and represent equilibrium properties at the specified pressure.

Understanding the Property Trends

Specific heat capacity (Cp) indicates the amount of energy required to raise the temperature of sulfur trioxide and is critical for energy balance and heat-exchanger design.
Density (ρ) and molar volume (Vm) describe volumetric behavior and are required for flow calculations, equipment sizing, and storage design.
Dynamic viscosity (μ) governs fluid flow resistance, influencing Reynolds number and pressure drop.
Thermal conductivity (k) and Prandtl number (Pr) are essential inputs for convective heat-transfer correlations.
Specific enthalpy (H) and specific entropy (S) are fundamental thermodynamic properties used in process modeling, compression, and expansion analysis.

Property trends with temperature may vary depending on molecular structure, intermolecular interactions, and phase stability.

Engineering Applications

The temperature-dependent properties of sulfur trioxide at atmospheric pressure are commonly required in:

Heat exchanger and reactor design
Process simulation and thermodynamic modeling
Fluid flow and pressure-drop calculations
Energy balance and equipment sizing
Chemical engineering education and research

These profiles are particularly useful when evaluating system performance over a wide operating temperature range under near-ambient pressure conditions.

Frequently Asked Questions

At what pressure are these properties calculated?
All properties on this page are calculated at a constant pressure of 1 atm (101325 Pa).

Can these values be used in process simulation software?
Yes. The data is suitable for preliminary design, validation, and educational use. For licensed simulators, vendor-specific property packages should be referenced.

Can I change the pressure or temperature range?
Yes. Use the interactive controls above to generate custom property profiles at different pressures or temperature ranges.

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