Which among the following equations represents the first law of thermodynamics under isobaric conditions?

Δ U = q_{p} - P_{e x} \cdot Δ V

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q_{v} = Δ U

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Δ U = W

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W = - q

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Solution

The correct option is A $Δ U = q_{p} - P_{e x} \cdot Δ V$
The internal energy change $Δ U = q_{p} + W$
$Δ U = q_{p} + (- P_{e x} \cdot Δ V)$ $(∵ W = - P_{e x} \cdot Δ V)$
$Δ U = q_{p} - P_{e x} \cdot Δ V$

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Similar questions

If the first law of thermodynamics is represented by $Δ u = q + w$ . The $q$ & $w$ represent?

Δ U = q + w

Δ U

Δ U = q + w

Δ U = q + w

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