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[" A certain mass of gas is expanded from ( "11,10" atm) to "(4L,5" atm) against a constant external pressure of "],[1" atm.If initial temperature of gas is "300K" and the heact capacity of process is "],[50JPC" .The the enthalpy change during the process is "(1L" at "cm_(2)-100J)],[[" (A) "AH=15kJ," (B) "AH=15.7kJ," (C) "Delta H=14.4kJ," (D) "AH=14.7kJ]]

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