Gases are sold and shipped in metal tanks under high pressure. A tank of compressed air has a volume of $25\mathrm{.}9L$ and is pressurized from $1$atm to $15\mathrm{.}6$atm at $T=298K.$ What work $($in $kJ)$ had to be done in filling this tank if the compressor operates at $15\mathrm{.}6$atm $?($Hint: What volume did the air occupy before it was compressed?$)$

kJ

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