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A gas (C(v.m)=(5)/(2)R) behaving ideall...

A gas `(C_(v.m)=(5)/(2)R)` behaving ideally was allowed to expand reversibly and adiabatically from 1 liter to
32 liter . It's initial at temperature was `327^(@)` C . The molar enthalpy changes `("in "J//"mole")` for the process is

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The correct Answer is:
`-3150`
`T_2 = 6600 (1/25)^(2//5)" "150 K`
`Delta H_m =(7R)/2 (150 - 600 )="-3150 Cal"`
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