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5. 1 . (80-10)
5 . 70
350 kkal
t₀ = 10 ⁰C
t₁ = 80⁰C ----> Δt= 70⁰C
c = 1 kkal/gram⁰C
Q = '.....?
Q = m.c.Δt
= 5000.1.70
= 350.000 kkal