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V1=1200 L= 1,2 m³
V2=2500 L= 2,5 m³
P= 3.10^5 pa
dit: W?
jwb:
W=P.∆V
W=P(V2-V1)
W=3.10^5(2,5-1,2)
W=3.10^5.1,3
W= 3,9.10^5 J= 390 kJ