An ideal gas expands from $1 \times 10^{-3} \ m^{3}$ to $1 \times 10^{-2} \ m^{3}$ at $300 \ K$ against a constant external pressure of $1 \times 10^{5} \ Nm^{-2}$. The work done is:

  • A
    $-9 \times 10^{2} \ J$
  • B
    $-9 \times 10^{3} \ J$
  • C
    $-0.7 \times 10^{3} \ J$
  • D
    $-1 \times 10^{3} \ J$

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