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Pressure over 1 literof s liquid isgraduallyincreasefrom1 vbar to 100 1 bar under adiabaticcondition. If the final volumeof theliquidis 990 ml , calculate DeltaE andDelta H of theprocess assurimg linearvariation of volumewith pressure.

Answer»

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Solution :Assuminglinervariationof volumewithpressue
W= areaunder the show line = `(10 xx 10^(-6) m^(3)) xx (10 ^(5) N//m^(2)) +(1)/(2)(1000xx 10^(5)N//m^(2))xx (10 xx 10^(-6) m^(3))`
` 1 J + 500 J = 501 J "JOULE"`
`DeltaE= 501 "Joule"`
`DeltaH=DeltaE+P_(1)V_(2)-P_(1)V_(1)`
`=501J +(1001+xx10^(5)N//m^(2))xx(990xx10^(6)m^(3))-(1xx10^(5)N//m^(2))`
`xx(1000xx10^(-6)m^(3))`
`=501 J +(99xx1001J)-(100J)`
`=99.5K J`


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