MCQ
In adiabatic expansion
  • A
    $\Delta U = 0$
  • $\Delta U = $negative
  • C
    $\Delta U = $positive
  • D
    $\Delta W = $zero

Answer

Correct option: B.
$\Delta U = $negative
b
(b) In case of adiabatic expansion $\Delta W$= positive and $\Delta Q = 0$
from FLOT $\Delta Q = \Delta U + \Delta W$

==> $\Delta U = - \Delta W$ i.e., $\Delta U$will be negative.

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