Two identical containers $A$ and $B$ with frictionless pistons contain the same ideal gas at the same temperature and the same volume $V$. The mass of the gas in $A$ is ${m_A}$ and that in $B$ is ${m_B}$. The gas in each cylinder is now allowed to expand isothermally to the same final volume $2V$. The changes in the pressure in $A$ and $B$ are found to be $\Delta P$ and $1.5 \Delta P$ respectively. Then:

  • A
    $4{m_A} = 9{m_B}$
  • B
    $2{m_A} = 3{m_B}$
  • C
    $3{m_A} = 2{m_B}$
  • D
    $9{m_A} = 3{m_B}$

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