Answer:
A) 90
B)absorbs heat
C)890
D)absorbs heat
E)300
F)absorbs heat
G)350
h) absorbs heat
Explanation:
A)heat flow ab
240-150=90
C) heat flow bc
680-240=440
work done =450
440+450= 890
E) heat flow ad
330-150=180
work done= 120
180+120=300
G)heat flow dc
680-330=350