Ideal diatomic gas
The ideal diatomic gas now has vibrational and rotational degrees of freedom in addition to translation. These additional degrees of freedom, especially at for low temperatures, are quantum mechanical in their nature.
- Terrell L. Hill "An Introduction to Statistical Thermodynamics" (1960) Chapter 8 ISBN 0486652424
- Donald A. McQuarrie "Statistical Mechanics", University Science Books (1984) (Re-published 2000) Chapter 6 ISBN 978-1-891389-15-3