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cT = 333,5 kJ/kg
cW = 4,2 kJ/kgK
cP = 2260 kJ/kg
Q = cL * m * ΔT + cT * m + cW * m * ΔT + cP * m
Q = 2,1 * (0 - (-20) + 333,5 + 4,2 * (100 - 0)) + 2260 = 3055,5 kJ
Odpowiedź: Kostce lodu należy dostarczyć 3055,5 kJ energii