Work done by the gas in the whole process is:

2kJ

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3.2kJ

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35kJ

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15kJ

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Solution

The correct option is B 35kJ
The V-T diagram for the process would be :
$d W = W_{a b} + W_{b c} = P d v + \frac{P_{1} V_{1} - P_{2} V_{2}}{γ - 1} = n R d T + \frac{n R d T}{γ - 1} = 35 k J$

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A B

\to

X P_{0} V_{0}

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