1.

0.5moleof anidealmonoatomic gas atSTP conditionsundergoes a process, if the finalvolumeof gas is(22.5xxe) lit,then theentropy change in thid processin k/J/mol is .(Given: Processisobaric ) (Fill your answerby multiplyingit with (100)/(R))

Answer»

Solution :`(V_(1))/(V_(2))= (T_(1))/(T_(2)) rArr (22.7//2)/(22.7. e)= (273)/(T_(2))rArr"" T_(2) = 273.(2E)`
`DeltaS = nC_(p)LM.(T_(2))/(T_(1))""0.5 xx (5)/(2)R xx LN. ((273).(2e))/((273))`
`= (5)/(4) R(ln 2e) =(5)/(4) R(ln 2 + ln e)""thereforeif LN2 =0.7`
`= (5)/(4) Rxx(1.7) xx(100)/(R)""= 212.5`


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