First slide

Thermodynamic processes

Question

In adiabatic expansion

Easy

A

$Δ U =$ negative
B

$Δ U = 0$
C

$Δ U =$ positive
D

$Δ W =$ zero

Solution

In case of Adiabatic expansion
$Δ W =$ Positive and $Δ Q = 0$
From $Δ Q = Δ U + Δ W$
$Δ U = - Δ W$

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