1.

An ideal gas is made to go through a cyclic thermodynamical process in four steps. The amount of heat involved are Q_(1) = 600 J, Q_(2) = - 400 J , Q_(3) = - 300 J " and " Q_(4) = 200 Jrespectively. The corresponding work involved are W_(1) = 300 J, W_(2) = - 200 J , W_(3) = - 150 J " and " W_(4) . The value of W_(4) is

Answer»

`-50 J`
`100 J`
`150 J`
`50 J`

Solution :For cyclic process , `Q = DELTA U + W`
or `600 - 400 - 300 + 200 = 300 - 200 - 150 + W_(4)`
` :. W_(4) = 150 J`


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