The following table gives the values of the Keesom (interaction between molecules with permanent dipole moments) and London (interaction between instant dipoles and induced dipoles) contributions to Van der Waals interactions between identical molecules in a sample of four pure compounds: argon (Z = 18), methane, ammonia and water. %3D Species Ar CH4 NH3 OH2 Keesom / J.mol-1 2130 12040 London / J.mol-1 550 1500 3570 4190 1. Propose an interpretation for each of the results: a) there is no Keesom contribution for methane but there is some for ammonia b) there is a London contribution for argon.

The following table gives the values of the Keesom (interaction between molecules with permanent dipole moments) and London (interaction between instant dipoles and induced dipoles) contributions to Van der Waals interactions between identical molecules in a sample of four pure compounds: argon (Z = 18), methane, ammonia and water. %3D Species Ar CH4 NH3 OH2 Keesom / J.mol-1 2130 12040 London / J.mol-1 550 1500 3570 4190 1. Propose an interpretation for each of the results: a) there is no Keesom contribution for methane but there is some for ammonia b) there is a London contribution for argon.

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

The following table gives the values of the Keesom (interaction between molecules with permanent dipole
moments) and London (interaction between instant dipoles and induced dipoles) contributions to Van der
Waals interactions between identical molecules in a sample of four pure compounds: argon (Z = 18),
methane, ammonia and water.
Species
Ar
CH4
NH3
OH2
Keesom / J.mol-1
2130
12040
London / J.mol-1
550
1500
3570
4190
1. Propose an interpretation for each of the results:
a) there is no Keesom contribution for methane but there is some for ammonia
b) there is a London contribution for argon.

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