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Thermodynamic Processes

6 kJ heat is ...

Question

$6 k J$ heat is provided to a system as well as work equivalent to $2 k J$ is done on the system. The total change in internal energy during these operations in $k J$ is ___________.

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Solution

According to the first law of thermodynamics,

$Δ U = q + w$ , where $w$ is the work done on the system.

In the given question, $w = 2$ kJ, $q = 6$ kJ

Hence, $Δ U = 2 + 6 = 8$ kJ

Hence, the correct answer is $8$ .

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