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c=4200 j/kg
suhu=80-20=60
ditanya=Q...?
jawab=Q=m.c.suhu
= 2 kg.4200 j/kg.60°C
=492.000 Joule
m= 2 kg air
∆t= 80°C-20°C= 60°C
C= 4200 j/kg
Rumus:
Q= m.c.∆t
Q= 2 kg. 4200 j/kg. 60°C
Q= 8400 j. 60 °C
Q= 504000 j/°C
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