2011

BC = - 10⁷

arrey soumik kabla ............. amr khali answer chai..................ami process bhalo-i jani.

(neways don't mind for the kabla...bhai ;-) )

i just used the fact that work done is equal to the area under P-V graph .

here it is = 1/2*(100+200)*200 kPa*cc
= 30 J

work is positive since vol. is increasing.

since dw=P.dV

we have to find the area projected by the curve on the axis representing volume.

why haven't you taken it as

1/2 x (500+700) x 100 ??