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11. thermodynamics — Physics STD 11 Science — Question

Gujarat BoardEnglish MediumSTD 11 SciencePhysics11. thermodynamics1 Mark
MCQ
A thermodynamic system is taken from an original state $D$ to an intermediate state $E$ by the linear process shown in the figure. Its volume is then reduced to the original volume from $E$ to $F$ by an isobaric process. The total work done by the gas from $D$ to $E$ to $F$ will be $......J$
  • A
    $-450$
  • ✓
    $450$
  • C
    $900$
  • D
    $1350$
✓

Answer

Correct option: B.
$450$
b
$W _{ DE }=\frac{1}{2}(600+300) 3\,J$

$=1350\,J$

$W _{ EF }=-300 \times 3=-900\,J$

$W _{ DEF }=450\,J$

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