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One mole of an ideal gas (C(v,m)=(5)/(2)...

One mole of an ideal gas `(C_(v,m)=(5)/(2)R)` at 300 K and 5 atm is expanded adiabatically to a final pressure of 2 atm against a constant pressure of 2 atm. Final temperature of the gas :

A

270 K

B

273 K

C

248.5 K

D

200 K

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The correct Answer is:
C
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