1.

400 cc volume of a gas having gamma = 5//2 is suddenly compressed to 100 cc. If the initial pressure is P, then the final pressure will be

Answer»

<P>P/32
8P
32P
16 P

Solution :Here, `V_(1) = 400 c c, V_(2) = 100 c c, gamma = (5)/(2), P_(1) = P = P_(2) = ?`
Sudden compression is an adiabatic process.
For an adiabatic process, `PV^(gamma)` = CONSTANT `:. P_(1)V_(1)^(gamma) = P_(2)V_(2)^(gamma)`
or `P_(2) = P_(1)((V_(1))/(V_(2)))^(gamma) = P((400)/(100))^(5//2) = (2^(2))^(5//2)P = 32P`


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