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= 84 . 1000 J
= 84000 J
m = 500 g
= 0,5 kg
c = 4200 J/kg . K
= 4200 J/kg . °C
to = 20°C
Ditanyakan : t₁ (to + Δt)
Penyelesaian : Δt = Q : (m . c)
= 84000 : (0,5 . 4200)
= 84000 : 2100
= 40°C
t₁ = to + Δt
= 20°C + 40°C
= 60°C