Estimate the heat of vaporization (kJ/mol) of benzene at 25C, using each of the following correlations and
Question:
Estimate the heat of vaporization (kJ/mol) of benzene at 25°C, using each of the following correlations and data:
(a) The heat of vaporization at the normal boiling point and Watson’s correlation.
(b) The Clausius–Clapeyron equation and boiling points at 50 mm Hg and 150 mm Hg.
(c) Tables B.1 and B.2.
(d) Find a tabulated value of the heat of vaporization of benzene at 25°C. (Suggestion: Do the same thing you do when you want to find almost any item of information.) Then calculate the percentage errors that result from the estimations of Parts (a), (b), and (c).
Table B.2
TABLE B.2 Heat Capacities Form 1: C,[kJ/(mol-C)] or [kJ/(mol-K)] = a + bT + cr + dT Form 2: C,k/(molC)j or [kJ/(mol-K)j = a + bT + cT2 Example: (C,)acetone(e) = 0.07196 + (20.10 x 10-5)r - (12.78 x 10-8)7? + (34.76 x 10-12)Tr*, where T is in °C. %3D Note: The formulas for gases are strictly applicable at pressures low enough for the ideal-gas equation of state to apply. Range (Units of T) Mol. Temp. State Form Unit a x 10 ex 10 d x 1012 Compound Formula Wt. bx 10 Acetone CH;COCH; 58.08 1 °C 123.0 18.6 -30-60 °C 71.96 34.76 20.10 6.053 0.4147 -12.78 -5.033 0.3191 0-1200 0-1200 0-1500 C;H2 26.04 29.0 °C 42.43 28.94 28.09 18.20 -1.965 1.965 -6.686 Acetylene Air 0.1965 0.4799 273-1800 Ammonia NH, 17.03 1 °C 35.15 2.954 0.4421 0-1200 Ammonium sulfate Benzene (NH4),SO4 132.15 C,H, 215.9 275-328 6-67 126.5 74.06 78.11 1 °C 23.4 32.95 -25.20 77.57 0-1200 CH10 CH10 CHs CaC2 CACO, Ca(OH)2 CaO Isobutane 58.12 89.46 49.87 30.13 27.88 -18.91 0-1200 0-1200 n-Butane 58.12 92.30 -15.47 34.98 Isobutene 56.10 82.88 25.64 -17.27 50.50 0-1200 Calcium carbide Calcium carbonate Calcium hydroxide 64.10 68.62 -8.66 x 1010 -12.87 x 1010 2 K 1.19 298-720 100.09 K 82.34 89.5 4.975 273-1033 74.10 K 276-373 -4.52 x 1010 -4.891 x 1010 -2.887 Calcium oxide 56.08 12.01 K 41.84 2.03 273-1173 Carbon с 11.18 1.095 273-1373 CO2 CO Carbon dioxide 44.01 36.11 4.233 7.464 0-1500 Carbon monoxide 28.01 1. 28.95 0.4110 0.3548 -2.220 0-1500 Carbon tetrachloride CC4 Ch 153.84 93.39 12.98 1.367 0.6117 273-343 0-1200 273-1357 Chlorine 70.91 1 °C 33.60 -1.607 6.473 Соpper Cu 63.54 1. K 22.76 212 21-
Step by Step Answer:
a b c d The heat of vaporization at normalt b p of benzene is 3072 kJm2 ieat 1009c 35...View the full answer
Elementary Principles of Chemical Processes
ISBN: 978-1119498759
4th edition
Authors: Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
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