Jawabanmu

2014-05-04T20:35:22+07:00
Q1 = m.ces. delta t = 5 . 2100. 20 = 210000 J
Q2 = m.L = 5 . 336000 = 1680000 j
Q3 = m. cair . delta t = 5. 4200. 100 = 2100000 J
Q4 = m. u = 5 . 2268000 = 11340000 J
Q = m . Cuap . Delta t = 5 .2100.  20 = 210000 J
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2014-05-04T20:46:45+07:00
Diketahui.
m  = 5 kg
ΔT = T₂-T₁=120°C-(-20)°C=140
c    = 336000 J/kg°C
Q    = m x c x ΔT
       = 5 kg x 140°C x 336000 J/kg°C
       = 235200000 J = 235200 kj
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