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m2 = 300 gram
ΔT1 = 80 − t
ΔT2 = t − 20
dit : Suhu akhir = t = ......?
Peny : Qlepas = Qterima
m1c1ΔT1 = m2c2ΔT2
(200)(1)(80 − t) = (300)(1)(t − 20)
(2)(1)(80 − t) = (3)(1)(t − 20)
160 − 2t = 3t − 60
5t = 220
t = 44oC