A sample of certain mass of an ideal polyatomic gas is expanded against constant pressure of 1 atm adiabatically from volume 2L, pressure 6 atm and temperature 300 K to state where its final volume is

Question

A sample of certain mass of an ideal polyatomic gas is expanded against constant pressure of 1 atm adiabatically from volume 2L, pressure 6 atm and temperature 300 K to state where its final volume is 8L. Calculate entropy change (in J/K) in the process. (Neglect vibrational degrees of freedom) [Take 1L atm = 100J, R=8.0 J/mol/K log 2=0.3, log 3=0.48 log e=2.3]

Prashant Kotian · Accepted Answer

Correct answer: A. PV 6×2 n= = =0.5mol RT

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