Nomor 11 dan 12 gan, + caranya

11 . W = Q1 ( 1 - T2/T1)
= 600 ( 1 - 400/600)
= 600 ( 1/3)
= 200 J
12. A ke B Isokhorik (W=0)
B ke C Isobarik (W = P V)
W = 2 × 10^5 . (3,5 - 1,5)
= 2 × 10^5 . 2
= 4 × 10^5 atau 400 kJ