Sample Calculations 1.Corrected Barometric Pressure

2.Molar Mass of Moist Air

3.Density of Moist Air

4.Calibration constants

Linearizing:

A.For water

Table 7._. Calibration data using various substances Substanceh, cm/(-o), dyne cm2/g Water2.271.56886 Ethyl Acetate1.225.58976 Acetone0.228.85955 Removing the data for Acetone and plotting the remaining values: Fig. 7._.

y = 45.979x - 29.585 R = 1 0 10 20 30 40 50 60 70 80 11.21.41.61.822.22.4 /-o,dyne cm2/g h, cm 5.Density (1-propanol, 0.05M)

For 1-propanol Concentration, Msoln (g/cm3) 0.80.987666533522518 0.70.987879984147238 0.60.988581321914172 0.50.989516438936752 0.40.990888621524233 0.30.987686862153444 0.20.993358550181699 0.050.995818314523702 For NaCl Concentration, Msoln (g/cm3) 0.51.015557415 0.251.024237741 11.032979052 1.51.05134597 21.069743381 6.Surface Tension a.1-propanol (0.05M)

7.Surface Excess Concentration () and effective cross-sectional area (ECAPM) a.Surface Excess Concentration ()

Linearizing:

For 1-propanol: lnC, N/m -0.223143551314210.05246157669770 -0.356674943938730.05247292740821 -0.510825623765990.05251022259991 -0.693147180559950.06164902554004 -0.916290731874160.06173461273605 -1.203972804325940.06153490927870 -1.609437912434100.07557528075496 -2.995732273553990.06204209266245

b.Effective cross-sectional area per molecule (ECAPM)

y = -0.0048x + 0.0549 R = 0.3135 0.04 0.05 0.05 0.06 0.06 0.07 0.07 0.08 0.08 -3.50-3.00-2.50-2.00-1.50-1.00-0.500.00 , N/m ln C, M For NaCl lnC, N/m -0.6931471810.352458148 -1.3862943610.360178253 00.349022431 0.4054651080.355234997 0.6931471810.351631049

y = -0.0031x + 0.3531 R = 0.3876 0.348 0.35 0.352 0.354 0.356 0.358 0.36 0.362 -1.5-1-0.500.51 , N/m lnC