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T1= 150 C
T2= 95 C
c air= 1 kal/g C
Ditanya= Q=...?
Jawab= ΔT= T2 - T1= 95 - 150= -55 C
Q= mc ΔT
Q= 250 x 1 x (-55)
Q= -13750 kalori
1 kalori = 4,2 J
Q= -13570 x 4,2
Q= -57750 J