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Q₁ = m * cl *Δt
Q₁ = 1 kg * 2100 J/kg * C * ([ 0 C - (-20 C ) ]
Q₁ = 42000 J = 42 kJ
2. topnienie lodu
Q₂ = m * ct
Q₂ = 1 kg * 334000 J/kg = 334000 J = 334 kJ
3. ogrzanie wody powstałej po stopieniu lodu do temp. wrzenia
Q₃ = m * cw *Δt
Q₃ = 1 kg * 4200 J/kg * C * ( 100 C - 0 C )
Q₃ = 420000 J = 420 kJ
4. odparowanie wody
Q₄ = m * cp
Q₄ = 1 kg * 2300000 J/kg
Q₄ = 2300000 J = 2300 kJ
Q = Q₁ + Q₂ + Q₃ + Q₄
Q = 3098 kJ = 3,096 MJ ≈ 3,1 MJ