Two moles of helium gas expanded isothermally and irreversibly at 27 o C from volume 1 d m 3 to 1 m 3 at constant pressure of 100 k Pa . Calculate the work done.

Question

Two moles of helium gas expanded isothermally and irreversibly at 27 o C from volume 1 d m 3 to 1 m 3 at constant pressure of 100 k Pa . Calculate the work done., 99900 J, − 99900 J, 34464 .65 J, − 34464 .65 J

MARKS App · Accepted Answer

W = - P∆ V Given, P = 1 0 0 k Pa = 1 0 5 Pa V 1 = 1 d m 3 = 10 - 3 m 3 , V 2 = 1 m 3 W = − 10 5 × 1 − 10 − 3 J ∴ W = − 99900 J

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