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One mole of an ideal gas is taken from a...

One mole of an ideal gas is taken from a to b along two paths denoted by the solid and the dashed lines as shown in the graph below. If the work done along the solid line path is `w_(s)`, and that along the dotted line path is `w_(d)`, then the integer closest to the ratio `w_(d)//w_(s)` is:

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The correct Answer is:
2
`w_(d) = 4 xx 1.5 + 1 xx 1 + 2.5 xx 2//3 = 8.65`
Process is isothermal
`w_(s) = 2 xx 2.303 log 55/0.5 = 2 xx 2.303 xx log 11 = 2 xx 2.303 xx 1.0414 = 4.79`
`w_(d)/w_(s) = 8.65/4.79 = 1.80 =2`
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