Consider a movable wall in the
gas container, such as a piston. When
the pressure exerted by the gas on the piston is greater than the outer
pressure the wall shall move, until the gas and external pressure
become
equal. In this process the gas has done some work on the piston.

EXPERIENCE:
The expansion of a gas.
Let us begin with the
most simple case, a By pressing "On" the particle is set into motion with an energy that is shown in a window. When the particle bounces off the wall, this starts moving with a certain energy, which is the energy lost by the particle. The same experiment can
be carried out with |

06.Q1.
QUESTION:
Looking at the results in the previous experience, choose one of the following options: |

In a finite displacement of the wall it is necessary to assume that the process is quasi-static, i.e. slow enough as to allow to define the instantaneous pressure in the gas, and then sum the infinitesimal contributions P*&V. In the limit, this sum becomes the integral of the pressure over the range of variation of the volume.

Index | 1.Introduction | 2.Pressure | 3.Temperature | 4.internal Energy |

5.Heat | 7.First Law | 8.Entropy | 9.Velocity Distribution | 10.Specific Heat |