Entropy of rotation

The entropy of rotation describes the proportion of the rotation of the molecule in the entropy of a substance. The entropy of rotation is greater, the greater the moment of inertia (correlated with the molecule size) and the temperature of the molecules involved . It decreases with an increasing number of symmetries or when molecules are sterically hindered from rotating . Monolayers of adsorbed molecules can be stabilized in a measurable way. The rotational entropy can be calculated with the help of the rotational state sum.

See also

• Molecular physics
• Statistical Thermodynamics

General textbooks

• PW Atkins : Physical Chemistry . Wiley-VCH, 2006, ISBN 978-3-527-31546-8 .
• G. Wedler : Textbook of Physical Chemistry . Wiley-VCH, 2004, ISBN 3-527-31066-5 .
• T. Engel, P. Reid: Physical chemistry . Pearson Studies, 2006, ISBN 978-3-8273-7200-0 .

Individual evidence

1. ↑ Thomas Waldmann, Jens Klein, Harry E. Hoster, R. Jürgen Behm: Stabilization of Large Adsorbates by Rotational Entropy: A Time-Resolved Variable-Temperature STM Study . In: ChemPhysChem . 2012, p. n / a – n / a , doi : 10.1002 / cphc.201200531 .