The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from A→B→C is 30J and 40J heat is given to the system. The change in internal energy between A and C is

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The P-V diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from A→B→C is 30J and 40J heat is given to the system. The change in internal energy between A and C is
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70 J

10 J

84 J

134 J

answer is A.

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Detailed Solution

Heat given $∆$ Q = 40 J and Work done $∆$ W = 30 J
$∆$ U = $∆$ Q – $∆$ W = 40 – 30 = 10 J

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