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2. What are the equilibrium vapor and liquid mole fractions of an equimolar feed of benzene, sopropylbenzene, and isobutylbenzene at 760 mmHg and 150 C? How much of the feed is vaporized isothermally?

2. What are the equilibrium vapor and liquid mole fractions of an equimolar feed of benzene, sopropylbenzene, and isobutylbenzene at 760 mmHg and 150 C? How much of the feed is vaporized isothermally?

Introduction to Chemical Engineering Thermodynamics
Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
Section: Chapter Questions
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2. What are the equilibrium vapor and liquid mole fractions of an equimolar feed of benzene, isopropylbenzene, and isobutylbenzene at 760 mmHg and 150 C? How much of the feed is vaporized isothermally? See the "Vapor Pressures and Boiling Points of Sixty API-NBS Hydrocarbons” document uploaded below. Use the Antoine equation and the reported constants to get vapor pressures. You can assume ideal behavior in the vapor and liquid phases. Vapor Pressures and Boiling Points of Sixty API-NBS Hydrocarbons¹ The experimental data on the hydrocarbons were correlated, the method of least squares being used, with the three-constant Antoine equation for vapor pressures, log P=A-B/(C+t) or t=B/(A-log P)-C. TABLE 1. Experimental data t Benzene °C 80.948 80. 461 79.909 79.424 78.903 74.035 67. 148 60.803 54.852 49. 084 44. 294 39. 095 35. 207 31.013 26.908 23. 271 20. 628 17.697 14.575 10.983 Benzene. P mm Hg 780.04 768. 51 755.48 741.29 732.38 628. 15 501.00 402.76 325, 21 261.95 217.34 176.06 149.58 124.75 103.81 87.90 77.47 67.42 57.68 47.98 Isobutylbenzene. Isopropylbenzene. t Isobutylbenzene ° C 173.814 173. 209 172. 526 171.920 171.270 165.217 156.632 148. 724 141.301 134. 112 128. 149 121.659 116.808 111.582 106.450 101.946 Compound 98. 620 95. 026 91. 118 86.637 P mm Hg 779.99 768.49 755, 59 744.41 732. 41 628. 21 500.99 402.73 325. 17 261.91 217.36 176. 07 149.60 124. 82 103. 81 87.92 77.47 67.44 57.73 48. 12 t Isopropylbenzene °C 153.40 152.82 152. 17 151.59 150.97 137.01 129. 46 122.38 115. 52 109.82 103.64 99.00 94.01 89. 11 84.82 81.64 78. 23 74.47 70.16 Formula P mm Hg 780.09 768.55 755. 54 744.34 732.43 501.03 402. 79 325, 25 261.98 217.37 176.09 149. 61 124. 78 103. 83 87.92 77.49 67.45 A 57.70 48.01 Constants of the Antoine equation log10 P-A-B/(C+t), or t= P/(A-log10 P)-C (P in mm Hg; t in ° C) C6H6 6.91210 C10H14 6.93033 C9 H12 6.93958 B 1214.645 1526. 384 1462. 717 C 221. 205 204. 171 207.993 Normal boiling point 760 mm Hg 80.099 172.759 1.52.392 Pressure coefficient, dt/dP, at 760 mm Hg 0.04271 .05319 .05074 Range of measurement. Pressure Temperature 48 to 780 48 to 780 48 to 780 10.9 to 80.9 86.6 to 173.8 70.2 to 153.4 Meas- ure of preci- sion P 0.82 0.34 .39
Transcribed Image Text:2. What are the equilibrium vapor and liquid mole fractions of an equimolar feed of benzene, isopropylbenzene, and isobutylbenzene at 760 mmHg and 150 C? How much of the feed is vaporized isothermally? See the "Vapor Pressures and Boiling Points of Sixty API-NBS Hydrocarbons” document uploaded below. Use the Antoine equation and the reported constants to get vapor pressures. You can assume ideal behavior in the vapor and liquid phases. Vapor Pressures and Boiling Points of Sixty API-NBS Hydrocarbons¹ The experimental data on the hydrocarbons were correlated, the method of least squares being used, with the three-constant Antoine equation for vapor pressures, log P=A-B/(C+t) or t=B/(A-log P)-C. TABLE 1. Experimental data t Benzene °C 80.948 80. 461 79.909 79.424 78.903 74.035 67. 148 60.803 54.852 49. 084 44. 294 39. 095 35. 207 31.013 26.908 23. 271 20. 628 17.697 14.575 10.983 Benzene. P mm Hg 780.04 768. 51 755.48 741.29 732.38 628. 15 501.00 402.76 325, 21 261.95 217.34 176.06 149.58 124.75 103.81 87.90 77.47 67.42 57.68 47.98 Isobutylbenzene. Isopropylbenzene. t Isobutylbenzene ° C 173.814 173. 209 172. 526 171.920 171.270 165.217 156.632 148. 724 141.301 134. 112 128. 149 121.659 116.808 111.582 106.450 101.946 Compound 98. 620 95. 026 91. 118 86.637 P mm Hg 779.99 768.49 755, 59 744.41 732. 41 628. 21 500.99 402.73 325. 17 261.91 217.36 176. 07 149.60 124. 82 103. 81 87.92 77.47 67.44 57.73 48. 12 t Isopropylbenzene °C 153.40 152.82 152. 17 151.59 150.97 137.01 129. 46 122.38 115. 52 109.82 103.64 99.00 94.01 89. 11 84.82 81.64 78. 23 74.47 70.16 Formula P mm Hg 780.09 768.55 755. 54 744.34 732.43 501.03 402. 79 325, 25 261.98 217.37 176.09 149. 61 124. 78 103. 83 87.92 77.49 67.45 A 57.70 48.01 Constants of the Antoine equation log10 P-A-B/(C+t), or t= P/(A-log10 P)-C (P in mm Hg; t in ° C) C6H6 6.91210 C10H14 6.93033 C9 H12 6.93958 B 1214.645 1526. 384 1462. 717 C 221. 205 204. 171 207.993 Normal boiling point 760 mm Hg 80.099 172.759 1.52.392 Pressure coefficient, dt/dP, at 760 mm Hg 0.04271 .05319 .05074 Range of measurement. Pressure Temperature 48 to 780 48 to 780 48 to 780 10.9 to 80.9 86.6 to 173.8 70.2 to 153.4 Meas- ure of preci- sion P 0.82 0.34 .39
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