1 / 18

Physics C Chapter 21 From serway book Prepared by Anas A. Alkanoa

Physics C Chapter 21 From serway book Prepared by Anas A. Alkanoa M.Sc.( master degree) in Theoretical Physics, Electromagnetic Waves (Optical Science) , Islamic University of Gaza (Gaza, Palestine). Chapter Five The Kinetic Theory of Gases.

nhu
Download Presentation

Physics C Chapter 21 From serway book Prepared by Anas A. Alkanoa

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Physics C Chapter 21 From serway book Prepared by Anas A. Alkanoa M.Sc.( master degree) in Theoretical Physics, Electromagnetic Waves (Optical Science) , Islamic University of Gaza (Gaza, Palestine).

  2. Chapter Five The Kinetic Theory of Gases 20.1 Molecular Model of an Ideal Gas 20.2 Molar Specific Heat of an Ideal Gas 20.3 Adiabatic Processes for an Ideal Gas

  3. 20.1 Molecular Model of an Ideal Gas we make the following assumptions: 1) The number of molecules in the gas is large, and the average separation between them is large compared with their dimensions. 2) The molecules obey Newton’s laws of motion, but as a whole they move randomly. 3) The molecules interact only by short-range forces during elastic collisions. 4) The molecules make elastic collisions with the walls. 5) The gas under consideration is a pure substance; that is, all molecules are identical.

  4. For our first application of kinetic theory, let us derive an expression for the pressure of N molecules of an ideal gas in a container of volume V in terms of microscopic quantities. The container is a cube with edges of length d Figure.

  5. A molecule of mass m makes an elastic collision with the wall of the container. Its x component of momentum is reversed, while its y component remains unchanged. In this construction, we assume that the molecule moves in the xy plane. Remark: The subscript i here refers to the ith molecule, not to an initial value.

  6. This result indicates that the pressure of a gas is proportional to the number of molecules per unit volume and to the average translational kinetic energy of the molecules

  7. 20.2 Molar Specific Heat of an Ideal Gas Because Tis the same for each path, the change in internal energy Eint is the same for all paths. the heat Q is different for each path because W (the negative of the area under the curves) is different for each path.

  8. where Cvis the molar specific heat at constant volume and Cpis the molar specific heat at constant pressure.

More Related