110 ; J of heat is added to a gaseous system, whose internal ener… - Vidyadip

MCQ

$110\; J$ of heat is added to a gaseous system, whose internal energy change is $40\; J$, then the amount of external work done is ........ $J$

A
$150 $
✓
$70 $
C
$110 $
D
$40 $

✓

Answer

Correct option: B.

$70 $

b
$\Delta Q = \Delta U + \Delta W$ $\Rightarrow$ $\Delta W = \Delta Q - \Delta U = 100 - 40 = 70J$

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