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P.(MPa) P...(MPa) (b)

Compare the work obtained from the two isothermal expansions (T = 400 K) for 5 moles of
ideal gas following path (i) in (a) and path (ii) in (b) shown in figure below. Which path
shows an isothermal reversible expansion? show and explain the steps please
Pinitial = 0.2 MPa and Pfinal = 0.1 MPa.

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Answer #1

Soudled! lcea - > given Ti = look nas moles - Pi = 6.2 MP , P2 = 12 = 0.1 mpa Joe path 0 - ② - ③ Whet = wife + w2-3 = P(13-V2too ale=eu-dew = te= etras MRT en (b) W = (5)(8.314x400) en lo ? ) = 11528.65 so work in Path ② is greater than perth 0 Path(Constant at every point dreing process while in pash @ siest decrease than increase.

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