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336.000 = 2 x4200 x t2-30
336.000 = 8400 x t2-30
t2-30 = 336.000 / 8400
= 40-30
= 10
= 336 . 1000 J
= 336000 J
m = 2 kg
to = 30°C
c = 4200 J/kg °C
Ditanyakan : t₁ (to + Δt)
Penyelesaian : Δt = Q : (m . c)
= 336000 : (2 . 4200)
= 336000 : 8400
= 40°C
t₁ = to + Δt
= 30°C + 40°C
= 70°C