• The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Inches
• The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Pounds
• The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Feet
• The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Divided

The normal boiling point of c2h5oh, is 78.3C and it's molar enthalpy of vaporization is 38.56 kj/mol. What is the change in enthropy in the system in J/K when 97.2 g of c2h5oh(g) at 1 atm condenses to liquid at the normal boiling point? The answer is -231. How do i get to that number? Please explain and thanks in advance!

A new group contribution method for estimating the enthalpy of vaporization at 298.15 K (ΔHV(298.15 K)) and at the normal boiling temperature (ΔHV(Tb)), as well as the entropy of vaporization at the normal boiling temperature (ΔSV(Tb)), of pure organic compounds has been developed. Large databases of critically assessed data have been used for group contribution calculations: data for 831. (a) Assuming benzene molecules contain three single and three double carbon − carbon bonds and use mean bond enthalpy data. (Mean bond enthalpies / kJ mol − 1: C − C, 347; C=C, 612; C − H, 412.) (b) The enthalpy change of combustion of liquid benzene at 298 K is − 3267.4 kJ mol − 1. The enthalpy change of vaporization of benzene is. The standard reaction enthalpy for the combustion of propane,. is −2220 kJ mol −1. Calculate the standard enthalpy of combustion of propene. Answer The combustion reaction we require is. This reaction can be recreated from the following sum:. Test 2.6 Calculate the enthalpy of hydrogenation of benzene from its enthalpy. Nine tells us that the normal boiling point of benzene is 80.1 to be selfishness on the heat of vaporization or adult H back is 30.7 killed. It asks us to calculate the boiling point of bendy and in Celsius on top of Mount Everest, where the pressure is equal to 260 millimeters mercury.

• Formula: C₆H₆
• Molecular weight: 78.1118
• IUPAC Standard InChI:
  

  InChI=1S/C6H6/c1-2-4-6-5-3-1/h1-6H Download the identifier in a file.

• IUPAC Standard InChIKey:UHOVQNZJYSORNB-UHFFFAOYSA-N
• CAS Registry Number: 71-43-2
• Chemical structure:
  This structure is also available as a 2d Mol fileor as a computed3d SD file
  The 3d structure may be viewed usingJavaorJavascript.
• Isotopologues:
• Other names:[6]Annulene;Benzol;Benzole;Coal naphtha;Cyclohexatriene;Phenyl hydride;Pyrobenzol;Pyrobenzole;Benzolene;Bicarburet of hydrogen;Carbon oil;Mineral naphtha;Motor benzol;Benzeen;Benzen;Benzin;Benzine;Benzolo;Fenzen;NCI-C55276;Phene;Rcra waste number U019;UN 1114;NSC 67315;1,3,5-Cyclohexatriene
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• Information on this page:
• Other data available:
  • Reaction thermochemistry data:reactions 1 to 50,reactions 51 to 99
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Phase change data

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

Data compiled as indicated in comments:
TRC - Thermodynamics Research Center, NIST Boulder Laboratories, Kenneth Kroenlein director
BS - Robert L. Brown and Stephen E. Stein
DRB - Donald R. Burgess, Jr.
ALS - Hussein Y. Afeefy, Joel F. Liebman, and Stephen E. Stein
AC - William E. Acree, Jr., James S. Chickos
DH - Eugene S. Domalski and Elizabeth D. Hearing

Enthalpy of vaporization

Enthalpy of vaporization

Δ_vapH = A exp(-αT_r) (1 − T_r)^β
Δ_vapH = Enthalpy of vaporization (at saturation pressure) (kJ/mol)
T_r = reduced temperature (T / T_c)

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Antoine Equation Parameters

log₁₀(P) = A − (B / (T + C))
P = vapor pressure (bar)
T = temperature (K)

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Enthalpy of sublimation

Enthalpy of fusion

Entropy of fusion

In addition to the Thermodynamics Research Center(TRC) data available from this site, much more physicaland chemical property data is available from thefollowing TRC products:

References

Go To:Top, Phase change data, Notes

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

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Kruif, C.G.,Enthalpies of sublimation and vapour pressures of 11 polycyclic hydrocarbons,J. Chem. Thermodyn., 1980, 12, 243-248. [all data]

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Lubomska, Banas, et al., 2002
Lubomska, Monika; Banas, Agnieszka; Malanowski, Stanislaw K.,Vapor-Liquid Equilibrium in Binary Systems Formed by Allyl Alcohol with Benzene and with Cyclohexane,J. Chem. Eng. Data, 2002, 47, 6, 1466-1471, https://doi.org/10.1021/je025540l. [all data]

The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Inches

Liu and Dickhut, 1994
Liu, Kewen; Dickhut, Rebecca M.,Saturation vapor pressures and thermodynamic properties of benzene and selected chlorinated benzenes at environmental temperatures,Chemosphere, 1994, 29, 3, 581-589, https://doi.org/10.1016/0045-6535(94)90445-6. [all data]

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Ambrose, D.; Ewing, M.B.; Ghiassee, N.B.; Sanchez Ochoa, J.C.,The ebulliometric method of vapour-pressure measurement: vapour pressures of benzene, hexafluorobenzene, and naphthalene,The Journal of Chemical Thermodynamics, 1990, 22, 6, 589-605, https://doi.org/10.1016/0021-9614(90)90151-F. [all data]

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Dong, Jin-Quan; Lin, Rui-Sen; Yen, Wen-Hsing,Heats of vaporization and gaseous molar heat capacities of ethanol and the binary mixture of ethanol and benzene,Can. J. Chem., 1988, 66, 4, 783-790, https://doi.org/10.1139/v88-136. [all data]

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Natarajan, G.,High-temperature calorimeter for the measurement of vapor pressure and enthalpy of vaporization,Rev. Sci. Instrum., 1983, 54, 9, 1175, https://doi.org/10.1063/1.1137545. [all data]

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Tsonopoulos, Constantine; Wilson, G.M.,High-temperature mutual solubilities of hydrocarbons and water. Part I: Benzene, cyclohexane andn-hexane,AIChE J., 1983, 29, 6, 990-999, https://doi.org/10.1002/aic.690290618. [all data]

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Rao, Yaddanapudi J.; Viswanath, Dabir S.,Integral isobaric heats of vaporization of benzene-chloroethane systems,J. Chem. Eng. Data, 1977, 22, 1, 36-38, https://doi.org/10.1021/je60072a011. [all data]

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Svoboda, V.; Veselý, F.; Holub, R.; Pick, J.,Enthalpy data of liquids. II. The dependence of heats of vaporization of methanol, propanol, butanol, cyclohexane, cyclohexene, and benzene on temperature,Collect. Czech. Chem. Commun., 1973, 38, 12, 3539-3543, https://doi.org/10.1135/cccc19733539. [all data]

Mita, Imai, et al., 1971
Mita, Itaru; Imai, Isao; Kambe, Hirotaro,Determination of heat of mixing and heat of vaporization with a differential scanning calorimeter,Thermochimica Acta, 1971, 2, 4, 337-344, https://doi.org/10.1016/0040-6031(71)85035-9. [all data]

Forziati, Norris, et al., 1949
Forziati, Alphonse F.; Norris, William R.; Rossini, Frederick D.,Vapor pressures and boiling points of sixty API-NBS hydrocarbons,J. RES. NATL. BUR. STAN., 1949, 43, 6, 555-17, https://doi.org/10.6028/jres.043.050. [all data]

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Yarym-Agaev, N.L.; Fedos'ev, N.N.; Skorikov, K.G.,Zh. Fiz. Khim., 1949, 11, 1257. [all data]

Thomson, 1946
Thomson, George Wm.,The Antoine Equation for Vapor-pressure Data.,Chem. Rev., 1946, 38, 1, 1-39, https://doi.org/10.1021/cr60119a001. [all data]

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Scott, R.B.; Brickwedde, F.G.,Thermodynamic properties of solid and liquid ethylbenzene from 0 to 300 degrees K,J. RES. NATL. BUR. STAN., 1945, 35, 6, 501-17, https://doi.org/10.6028/jres.035.024. [all data]

Willingham, Taylor, et al., 1945
Willingham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D.,Vapor pressures and boiling points of some paraffin, alkylcyclopentane, alkylcyclohexane, and alkylbenzene hydrocarbons,J. RES. NATL. BUR. STAN., 1945, 35, 3, 219-17, https://doi.org/10.6028/jres.035.009. [all data]

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Smith, E.R.,Boiling points of benzene, 2,2,3-trimethylbutane, 3-ethylpentane, and 2,2,4,4-tetramethylpentane within the range 100 to 1,500 millimeters of mercury,J. RES. NATL. BUR. STAN., 1941, 26, 2, 129-17, https://doi.org/10.6028/jres.026.004. [all data]

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Eon, C.; Pommier, C.; Guiochon, G.,Vapor pressures and second virial coefficients of some five-membered heterocyclic derivatives,J. Chem. Eng. Data, 1971, 16, 4, 408-410, https://doi.org/10.1021/je60051a008. [all data]

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Williamham, Taylor, et al., 1945
Williamham, C.B.; Taylor, W.J.; Pignocco, J.M.; Rossini, F.D.,Vapor Pressures and Boiling Points of Some Paraffin, Alkylcyclopentane, Alkylcyclohexane, and Alkylbenzene Hydrocarbons,J. Res. Natl. Bur. Stand. (U.S.), 1945, 35, 3, 219-244, https://doi.org/10.6028/jres.035.009. [all data]

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The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Pounds

Notes

The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Feet

Go To:Top, Phase change data, References

The Enthalpy Of Vaporization Of Benzene Is 33.9 At 298 Divided

• Symbols used in this document:
  

  Pc	Critical pressure
  Tboil	Boiling point
  Tc	Critical temperature
  Tfus	Fusion (melting) point
  Ttriple	Triple point temperature
  Vc	Critical volume
  ΔfusH	Enthalpy of fusion
  ΔfusS	Entropy of fusion
  ΔsubH	Enthalpy of sublimation
  ΔsubH°	Enthalpy of sublimation at standard conditions
  ΔvapH	Enthalpy of vaporization
  ΔvapH°	Enthalpy of vaporization at standard conditions
  ρc	Critical density

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