Jawabanmu

2014-03-27T20:24:11+07:00
Pake crnya ASAS BLACK yg Qlepas=Qterima
m.c.deltaT == m.c.deltaT
2 kg. 4200J/kg C.(t-20) = 5 kg. 4200 J/kg C. (60-t)
8400 J/C .(t-20) = 21.000 J/C.(60-t)
8400t - 168000 = 1260000 - 21000t
8400t + 21000t = 1260000 + 168000
29400t = 1428000
t = 48,57 C

maaf kalo salah /salah ngitung nya..
s'moga membantu ;)
2014-03-27T20:28:26+07:00
Asas black : m.c.Δt=m.c.Δt
c bisa dihilangkan

2. (t-20) = 5.(60-t)
2t - 40 = 300 - 5t
2t + 5t = 300 + 40
7t = 340
t = 340/7 = 48,57⁰ C