One mole of nitrogen at 8 bar and 600 K is contained in a... — Answer & Explanation | PrepBeePakistan

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HomeMCQsChemical Engineering

MEDIUMENGLISHChemical Engineering

One mole of nitrogen at 8 bar and 600 K is contained in a piston-cylinder arrangement. It is brought to 1 bar isothermally against a resisting pressure of 1 bar. The work done (in Joules) by the gas is_________________?

Correct answer: B

Explanation

For isothermal work done against a constant external pressure (P_ext), W = P_ext * V1 * ln(V2/V1). Here, P_ext = 1 bar and the volume ratio is calculated using Boyle's law.

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