1.

Determine thetotalwork done by gas ( inJoule )if system follows an expansion process as shown in figure [Given : 1 barliter =100J]

Answer»

Solution :`P_(B)V_(B)^(2)` =`P_(C)V_(C)^(2)`
`or 50xx(0.4)^(2)=P_(C)xx(0.8)^(2)`
`or P_(C)=(50xx0.4xx0.4)/(0.8xx0.8)=12.5`
`W=W_(AB)+W_(BC)`
`= 50(0.4-0.2)+(P_(C)V_(C)-P_(B)V_(B))/(2+1)`
`=- 50 xx0.2+(12.5xx0.8 -50xx0.4)/(1)`
`= - 10 +(-10)=- 20 "bar LITER " =- 2000 J`
`W_(by)= 2000 J `


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