A sample of an ideal gas is expanded from \( 1 \mathrm{dm}^{3} \) to \( 3 \mathrm{dm}^{3} \) in ...

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A sample of an ideal gas is expanded from \( 1 \mathrm{dm}^{3} \) to \( 3 \mathrm{dm}^{3} \) in a reversible process for which \( \mathrm{P}=\mathrm{KV}^{3} \), with \( K=1 / 5\left(\mathrm{~atm} / \mathrm{dm}^{3}\right) \), what is work done by gas (in \( \mathrm{L} \) atm)?
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