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Volumes and Pressures of Gases in a Thermally Isolated Container

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Please see the attached file for full description of the problem concerning volume and pressure of gases in a thermally isolated container.

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Solution Summary

The solution explains clearly how to find various things about the volume and gas and how they and their equilibria changes in a thermally isolated container according to how the partition in the middle of it moves.

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For monoatomic gas: r (gamma) = 5/3 = 1.67
and, 1/r = 3/5 = 0.6
Because, no heat energy is transferred, hence, these processes will be adiabatic processes.
dQ = dU + dW
dQ = 0
dU = -dW

Now,
For gas A:
PA*VA/TA = PA'*VA'/TA' .....(1)
and,
PA*VA^r = PA'*VA'^r ....(2)
where, PA, VA and TA are the pressure, volume and temperature of gas A before unlock and PA', VA', and TA' are at the equilibrium.

Similarlly for gas B:
PB*VB/TB = PB'*VB'/TB' .....(3)
PB*VB^r = PB'*VB'^r ....(4)

At equilibrium: PA' = PB' ....(5)

Eqn ...

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  • BEng, Allahabad University, India
  • MSc , Pune University, India
  • PhD (IP), Pune University, India
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