Calculate the final volume when 2 moles of an ideal gas expand from $3 \mathrm{dm}^3$ at constant external pressure 1.6 bar and the work done in the process is $800 \mathrm{~J}$.

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Aicharya · Accepted Answer

$\begin{aligned} & \mathrm{W}=-\mathrm{P}_{	ext {ext }} \Delta \mathrm{V}=-\mathrm{P}_{	ext {ext }}\left(\mathrm{V}_2-\mathrm{V}_1ight) \ & \mathrm{V}_1=3 \mathrm{dm}^3 \ & \mathrm{~V}_2=? \ & \mathrm{P}_{	ext {ext }}=1.6 	ext { bar } \ & \mathrm{W}=-800 \mathrm{~J}=8 \mathrm{dm}^3 	ext { bar }\left(\because 100 \mathrm{~J}=1 \mathrm{dm}^3 	ext { bar }ight) \ & -8=-1.6\left(\mathrm{~V}_2-3ight) \ & \mathrm{V}_2-3=5 \ & \mathrm{~V}_2=8 \mathrm{dm}^3\end{aligned}$

Calculate the final volume when 2 moles of an ideal gas expand from $3 \mathrm{dm}^3$ at constant external…

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