To that work is equal at isothermal (t=35 °C) expansion from P1=5,06*10^5 Pa to P2 = 1,01*10^5 Pa of the mix consisting of 48 kg of O2 and 2 mol of N2.
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Explanation:
in isothermal expansion that to quasi stat process
work done = -pext delv
work done = -p gas del v
work done = -nrt/v del v
dw = -nrt dv/v
w = -nrt log v2/v1
w=nrt logv1/v2
w=p1v1 log p2/p1
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