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Sulfur dioxide Formula : O2S Molecular weight : 64.064

IUPAC Standard InChI:

o InChI=1S/O2S/c1-3-2

o Download the identifier in a file.

IUPAC Standard InChIKey: RAHZWNYVWXNFOC-UHFFFAOYSA-N

CAS Registry Number: 7446-09-5

Chemical structure: This structure is also available as a 2d Mol file

Other names: Sulfurous acid anhydride; Fermenicide powder; Fermenticide liquid; Sulfur oxide (SO2); Sulfurous anhydride; Sulfurous oxide; SO2; Sulphur dioxide; Fermenicide liquid; Schwefeldioxyd; Siarki dwutlenek; Sulfur oxide; UN 1079; Sulfur dioxide (SO2); Sulfur superoxide

Permanent link for this species. Use this link for bookmarking this species for future reference.

Information on this page:

o Gas Phase Heat Capacity (Shomate Equation)

o References

o Notes / Error Report

Other data available:

o Gas phase thermochemistry data

o Phase change data

o Reaction thermochemistry data: reactions 1 to 50, reactions 51 to 100, reactions 101 to 102

o Henry's Law data

o Gas phase ion energetics data

o Ion clustering data

o IR Spectrum

o Mass spectrum (electron ionization)

o Fluid Properties

Data at other public NIST sites:

o Microwave spectra (on physics lab web site)

o Electron-Impact Ionization Cross Sections (on physics web site)

o Computational Chemistry Comparison and Benchmark Database

o Gas Phase Kinetics Database

o X-ray Photoelectron Spectroscopy Database, version 4.1

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NIST / TRC Web Thermo Tables, "lite" edition (thermophysical and thermochemical data)

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Gas Phase Heat Capacity (Shomate Equation)

Go To: Top, References, Notes / Error Report

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cp° = 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 − HS° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G    Cp = 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)

298. - 1200. 1200. - 6000.

A 21.43049 57.48188

B 74.35094 1.009328

C -57.75217 -0.076290

D 16.35534 0.005174

E 0.086731 -4.045401

F -305.7688 -324.4140

G 254.8872 302.7798

H -296.8422 -296.8422

Reference Chase, 1998 Chase, 1998

CommentData last reviewed in June, 1961

Data last reviewed in June, 1961

Temperature(K)

Cp

(J/mol*K)S°

(J/mol*K)-(G° - H°298.15)/T

(J/mol*K)H° - H°298.15

(kJ/mol)

298. 39.87 248.2 248.2 -0.01

300. 39.94 248.5 248.2 0.07

400. 43.52 260.4 249.8 4.25

500. 46.56 270.5 253.0 8.76

600. 49.02 279.2 256.6 13.54

700. 50.96 286.9 260.4 18.55

800. 52.46 293.8 264.2 23.72

900. 53.60 300.1 267.8 29.03

1000. 54.47 305.8 271.3 34.43

1100. 55.18 311.0 274.7 39.91

1200. 55.81 315.8 277.9 45.46

Temperature(K)

Cp

(J/mol*K)S°

(J/mol*K)-(G° - H°298.15)/T

(J/mol*K)H° - H°298.15

(kJ/mol)

1200. 55.78 315.8 277.9 45.46

1300. 56.28 320.3 281.0 51.07

1400. 56.70 324.5 284.0 56.72

1500. 57.04 328.4 286.8 62.40

1600. 57.34 332.1 289.5 68.12

1700. 57.60 335.6 292.1 73.87

1800. 57.83 338.9 294.6 79.64

1900. 58.04 342.0 297.1 85.44

2000. 58.23 345.0 299.4 91.25

2100. 58.40 347.9 301.6 97.08

2200. 58.55 350.6 303.8 102.9

2300. 58.70 353.2 305.9 108.8

2400. 58.83 355.7 307.9 114.7

2500. 58.96 358.1 309.9 120.6

2600. 59.08 360.4 311.8 126.5

2700. 59.20 362.6 313.6 132.4

2800. 59.31 364.8 315.4 138.3

2900. 59.41 366.9 317.1 144.2

3000. 59.51 368.9 318.8 150.2

3100. 59.61 370.8 320.5 156.1

3200. 59.71 372.7 322.1 162.1

3300. 59.80 374.6 323.6 168.1

3400. 59.89 376.4 325.2 174.1

3500. 59.97 378.1 326.7 180.1

3600. 60.06 379.8 328.1 186.1

3700. 60.14 381.4 329.5 192.1

3800. 60.22 383.0 330.9 198.1

3900. 60.30 384.6 332.3 204.1

4000. 60.38 386.1 333.6 210.1

4100. 60.45 387.6 334.9 216.2

4200. 60.53 389.1 336.2 222.2

4300. 60.60 390.5 337.4 228.3

4400. 60.68 391.9 338.6 234.4

4500. 60.75 393.3 339.8 240.4

4600. 60.82 394.6 341.0 246.5

4700. 60.89 395.9 342.2 252.6

4800. 60.97 397.2 343.3 258.7

4900. 61.04 398.4 344.4 264.8

5000. 61.11 399.7 345.5 270.9

5100. 61.18 400.9 346.6 277.0

5200. 61.25 402.1 347.6 283.1

5300. 61.31 403.2 348.7 289.3

5400. 61.38 404.4 349.7 295.4

5500. 61.45 405.5 350.7 301.5

5600. 61.52 406.6 351.7 307.7

5700. 61.59 407.7 352.7 313.8

5800. 61.66 408.8 353.6 320.0

5900. 61.73 409.8 354.6 326.2

6000. 61.80 410.9 355.5 332.3

References

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes / Error Report

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Notes / Error Report

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.

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If you believe that this page may contain an error, please fill out the error report form for this page.

© 2011 by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.

Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.

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sulphur trioxide Formula : O3S Molecular weight : 80.063

CAS Registry Number: 7446-11-9

Information on this page:

o Gas Phase Heat Capacity (Shomate Equation)

o References

o Notes / Error Report

Other data available:

o Gas phase thermochemistry data

o Phase change data

o Reaction thermochemistry data

o Henry's Law data

o Gas phase ion energetics data

o Ion clustering data

o Vibrational and/or electronic energy levels

Data at other public NIST sites:

o Computational Chemistry Comparison and Benchmark Database

o Gas Phase Kinetics Database

Options:

o Switch to calorie-based units

Data at NIST subscription sites:

NIST / TRC Web Thermo Tables, professional edition (thermophysical and thermochemical data)

NIST subscription sites provide data under the NIST Standard Reference Data Program, but require an annual fee to access. The purpose of the fee is to recover costs associated with the development of data collections included in such sites. Your institution may already be a subscriber. Follow the links above to find out more about the data in these sites and their terms of usage.

Gas Phase Heat Capacity (Shomate Equation)

Go To: Top, References, Notes / Error Report

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Cp° = 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 − HS° = A*ln(t) + B*t + C*t2/2 + D*t3/3 − E/(2*t2) + G    Cp = heat capacity (J/mol*K)    H° = standard enthalpy (kJ/mol)    S° = standard entropy (J/mol*K)    t = temperature (K) / 1000.

View plot Requires a Java capable browser.

Temperature (K)

298. - 1200. 1200. - 6000.

A 24.02503 81.99008

B 119.4607 0.622236

C -94.38686 -0.122440

D 26.96237 0.008294

E -0.117517 -6.703688

F -407.8526 -437.6590

G 253.5186 330.9264

H -395.7654 -395.7654

Reference Chase, 1998 Chase, 1998

Comment

Data last reviewed in September, 1965

Data last reviewed in September, 1965

Temperature(K)

Cp

(J/mol*K)S°

(J/mol*K)-(G° - H°298.15)/T

(J/mol*K)H° - H°298.15

(kJ/mol)

298. 50.63 256.7 256.8 -0.01

300. 50.79 257.1 256.8 0.09

400. 57.70 272.7 258.8 5.53

500. 63.06 286.2 263.0 11.58

600. 67.22 298.0 267.9 18.10

700. 70.41 308.6 272.9 24.99

800. 72.81 318.2 278.0 32.16

900. 74.60 326.9 283.0 39.53

1000. 75.94 334.8 287.8 47.06

1100. 77.01 342.1 292.4 54.71

1200. 77.97 348.9 296.8 62.46

Temperature(K)

Cp

(J/mol*K)S°

(J/mol*K)-(G° - H°298.15)/T

(J/mol*K)H° - H°298.15

(kJ/mol)

1200. 77.92 348.9 296.8 62.46

1300. 78.64 355.1 301.1 70.29

1400. 79.22 361.0 305.1 78.19

1500. 79.70 366.5 309.0 86.13

1600. 80.09 371.6 312.8 94.12

1700. 80.42 376.5 316.4 102.1

1800. 80.69 381.1 319.9 110.2

1900. 80.93 385.5 323.2 118.3

2000. 81.14 389.6 326.4 126.4

2100. 81.31 393.6 329.5 134.5

2200. 81.47 397.4 332.5 142.7

2300. 81.61 401.0 335.4 150.8

2400. 81.73 404.5 338.2 159.0

2500. 81.84 407.8 340.9 167.2

2600. 81.93 411.0 343.6 175.3

2700. 82.02 414.1 346.1 183.5

2800. 82.10 417.1 348.6 191.7

2900. 82.17 420.0 351.0 200.0

3000. 82.23 422.8 353.4 208.2

3100. 82.29 425.5 355.7 216.4

3200. 82.34 428.1 357.9 224.6

3300. 82.39 430.6 360.0 232.9

3400. 82.44 433.1 362.2 241.1

3500. 82.48 435.5 364.2 249.4

3600. 82.51 437.8 366.2 257.6

3700. 82.55 440.0 368.2 265.9

3800. 82.58 442.2 370.1 274.1

3900. 82.61 444.4 372.0 282.4

4000. 82.63 446.5 373.8 290.6

4100. 82.66 448.5 375.6 298.9

4200. 82.68 450.5 377.4 307.2

4300. 82.70 452.5 379.1 315.4

4400. 82.72 454.4 380.8 323.7

4500. 82.74 456.2 382.4 332.0

4600. 82.75 458.0 384.1 340.3

4700. 82.77 459.8 385.7 348.5

4800. 82.78 461.6 387.2 356.8

4900. 82.80 463.3 388.8 365.1

5000. 82.81 464.9 390.3 373.4

5100. 82.82 466.6 391.8 381.7

5200. 82.83 468.2 393.2 389.9

5300. 82.84 469.8 394.6 398.2

5400. 82.86 471.3 396.0 406.5

5500. 82.87 472.8 397.4 414.8

5600. 82.88 474.3 398.8 423.1

5700. 82.89 475.8 400.1 431.4

5800. 82.90 477.2 401.4 439.7

5900. 82.91 478.7 402.7 447.9

6000. 82.92 480.1 404.0 456.2

References

Go To: Top, Gas Phase Heat Capacity (Shomate Equation), Notes / Error Report

Data compilation copyright by the U.S. Secretary of Commerce on behalf of the U.S.A. All rights reserved.

Chase, 1998Chase, M.W., Jr., NIST-JANAF Themochemical Tables, Fourth Edition, J. Phys. Chem. Ref. Data, Monograph 9, 1998, 1-1951. [all data]

Notes / Error Report

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.

Rate our products and services. Take the NIST Measurement Services Customer Satisfaction Survey.

If you believe that this page may contain an error, please fill out the error report form for this page.

© 2011 by the U.S. Secretary of Commerce on behalf of the United States of America. All rights reserved.

Copyright for NIST Standard Reference Data is governed by the Standard Reference Data Act.

Standard ReferenceData Program

DataGateway

ChemistryWebBook

If you have comments or questions about this site, please contact us.