The work (kJ) required to compress 2,400 L of an ideal gas to 400 L at a constant pressure of 120 kPa in a closed system is most nearly:

The work required to compress an ideal gas in a closed system under constant pressure is $W=\Delta V*p$, where $W$ is the work, $\Delta V$ is the change in volume, and $p$ is the pressure at which the gas is being compressed. Also to note that $1L*1kPa=1J$.

Applying this formula to the values we have:

$W=\Delta V*p\phantom{\rule{0ex}{0ex}}=(2400-400)*120\phantom{\rule{0ex}{0ex}}=2000*120=240000J\phantom{\rule{0ex}{0ex}}=240kJ$

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