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Q = m·c·Δt
⇒ Δt = Q/(m·c)
⇒ t₁ - t₀ = 180.000/(2 · 900) (180 kJ = 180.000 J)
⇒ t₁ - 20° = 100
⇒ t₁ = 120° C
jadi jawaban kamu salah, yang benar adalah D