sir can you tell me something about free expansion of a gas
Asked by
| 9th May, 2008,
07:20: PM
In a free expansion, gas is allowed to expand into a vacuum. This happens quickly, so there is no heat transferred. No work is done, because the gas does not displace anything. According to the First Law, this means that:
DEint = 0
There is no change in internal energy, so the temperature stays the same.
On a PV diagram all you can do is plot the end-points. The process follows a path on the diagram that is not well-defined. Because the temperature is constant, the connection between the initial and final states is:
PiVi = PfVf
Answered by
| 11th May, 2008,
05:11: AM
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