China
Africa
Explore chapters and articles related to this topic
Gases: comparison with experiment
Published in Michael de Podesta, Understanding the Properties of Matter, 2020
For monatomic gases, we expect molecules to have no internal degrees of freedom. Therefore, there should be just three degrees of freedom per molecule, corresponding to the kinetic energy of molecule in each of the x-, y- and z- directions. Using p=3 in Equation 5.38 gives a prediction of CP=20.786 J K−1mol−1. As we can see from Figure 5.7, this value agrees closely with the data for monatomic gases given in Table 5.6 and Figure 5.3. We may take this as an indication that that the internal energy of a monatomic gas really is held in the kinetic energy of its constituent atoms, and in no other way.
Removal of Organic Contaminants From Water Using Sonolysis
Published in Gregory D. Boardman, Hazardous and Industrial Wastes, 2022
Xrominder PS. Suri, Michael R. Paraskewich, Qibin Zhang
The γ is a value which is inversely proportional to the internal degrees of freedom of a gas. Diatomic gases have higher degrees of freedom than monatomic gases. Hence, γ is higher for monatomic gases. When a gas is compressed or heated, the energy is partitioned across the internal degrees of freedom. For gases with high gamma values, the temperature as a result of cavity implosion will be higher. On the other hand, if the gas is thermally conductive, then heat will escape and a lower temperature will be achieved inside the bubble. Therefore, for the gases studied in this study, Argon appeared to be the most favorable gas for TCE destruction and is probably due to high specific heat ratio and low thermal conductivity.
Thermal Radiation
Published in E. M. Sparrow, R. D. Cess, Radiation Heat Transfer, 2018
Consider first radiation absorption by monatomic and diatomic gases. Monatomic gases do not, of course, undergo vibrational or rotational transitions. Furthermore, symmetrical diatomic molecules cannot, as a consequence of the fact that they have no electric dipole moment, significantly absorb and emit by means of vibration-rotation bands. Thus, for monatomic gases and for diatomic gases having symmetric molecules, there will be no absorption or emission in the infrared resulting from bound-bound transitions. It then follows that such gases are transparent to thermal radiation at low and moderate temperature levels.
Presenting a new predictive viscosity model based on virial-like equations of state for monatomic fluids
Published in Chemical Engineering Communications, 2018
In this work, the model has been applied to five pure monatomic fluids (helium, neon, argon, krypton, and xenon). The maximum reduced temperature and reduced pressure that have been applied in the model are 192.67 and 219.92, respectively. Throughout the paper, the viscosity is expressed in terms of (104 × Pa · s) and is indicated by μ′. Pressure and temperature are also expressed in terms of (MPa) and (K), respectively. As experimental data, fluid P–V–T data have been extracted from the NIST (2017).