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Experiment #09 Vapor Pressure and Enthalpy of Vaporization o

# Experiment #09 Vapor Pressure and Enthalpy of Vaporization...

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Experiment 9 Vapor Pressure and Enthalpy of Vaporization of Water Initial Data and Calculations: Barometric Pressure 744 mm Hg 63 mm Total pressure in the cylinder 749 mm Hg 0.000182 mol Data and Calculations: Temp Temp Volume Corrected V 1/T (K) (ml) (ml) (mm Hg) (mm Hg) 80.0 353.0 9.38 9.18 436.9 311.7 5.74 0.00283 75.0 348.0 8.39 8.19 482.8 265.8 5.58 0.00287 70.0 343.0 7.59 7.39 527.4 221.2 5.40 0.00292 65.0 338.0 6.98 6.78 566.5 182.2 5.20 0.00296 60.0 333.0 6.50 6.30 600.6 148.0 5.00 0.00300 55.0 328.0 6.15 5.95 626.4 122.2 4.81 0.00305 50.0 323.0 5.80 5.60 655.4 93.2 4.54 0.00310 2.0 275.0

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Unformatted text preview: 4.40 4.20 744.0 4.6 1.53 0.00364 Heat of Vaporization 44,075 J/mol 44.07 kJ/mol Difference in height between H 2 O in cylinder and H 2 O in beaker Moles of air trapped (use air volume at approx 0 o C) P air P water ln P water ( o C) (K-1 ) 0.00250 0.00270 0.00290 0.00310 0.00330 0.00350 1.50 2.00 2.50 3.00 3.50 4.00 4.50 5.00 5.50 6.00 f(x) = -5301.24x + 20.87 R² = 1 ln Vapor Pressure vs 1/T 1/T (K-1) ln Vap. Press. (mm Hg) 0.00370...
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