(c) The data set below represents the surface tension data for aqueous solutions of 3-methylbutanoic acid [(CH3)2CHCH₂COOH] at 25°C.[C] [mol.dm³] 0Y[mN.m']72.70.00964.60.02659.00.06551.30.13547.0(i) Calculate the surface excess of 3-methylbutanoic acid (in mol.m2) and(ii)Hence estimate the molecular cross sectional area (in nm²) for this surface activemolecule.(iii) Compare your estimate with the molecular cross sectional area one might expectfor n-butanoic acid and account for the difference, if any, between the two surfaceactive molecules.

The main aim of this question is to explain the surface excess of 3-methylbutanoic acid and…

(c) The data set below represents the surface tension data for aqueous solutions of 3- methylbutanoic acid [(CH3)2CHCH₂COOH] at 25°C. [C] [mol.dm³] 0 Y [mN.m'] 0.009 72.7 64.6 0.026 59.0 0.065 51.3 0.135 47.0 (i) Calculate the surface excess of 3-methylbutanoic acid (in mol.m²) and (ii) Hence estimate the molecular cross sectional area (in nm²) for this surface active molecule. (iii) Compare your estimate with the molecular cross sectional area one might expect for n-butanoic acid and account for the difference, if any, between the two surface active molecules.

(c) The data set below represents the surface tension data for aqueous solutions of 3- methylbutanoic acid [(CH3)2CHCH₂COOH] at 25°C. [C] [mol.dm³] 0 Y [mN.m'] 0.009 72.7 64.6 0.026 59.0 0.065 51.3 0.135 47.0 (i) Calculate the surface excess of 3-methylbutanoic acid (in mol.m²) and (ii) Hence estimate the molecular cross sectional area (in nm²) for this surface active molecule. (iii) Compare your estimate with the molecular cross sectional area one might expect for n-butanoic acid and account for the difference, if any, between the two surface active molecules.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

(c) The data set below represents the surface tension data for aqueous solutions of 3-
methylbutanoic acid [(CH3)2CHCH₂COOH] at 25°C.
[C] [mol.dm³] 0
Y[mN.m']
72.7
0.009
64.6
0.026
59.0
0.065
51.3
0.135
47.0
(i) Calculate the surface excess of 3-methylbutanoic acid (in mol.m2) and
(ii)
Hence estimate the molecular cross sectional area (in nm²) for this surface active
molecule.
(iii) Compare your estimate with the molecular cross sectional area one might expect
for n-butanoic acid and account for the difference, if any, between the two surface
active molecules.

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