How much heat must be spent to heat 2 water in an aluminum pan weighing 300 g from 20 to 80 C?
| May 15, 2021 | education
How much heat must be spent to heat 2 water in an aluminum pan weighing 300 g from 20 to 80 C? specific heat capacity of water 4200 J / kg C? specific heat of aluminum 920 J \ KG S?
The energy supplied will be used to heat the pot Q (Al) and the water in the pot (Q (H2O)).
Q = Q (Al) + Q (H2O) = m (Al) * Ship (Al) * ΔT + m (H2O) * Ship (H2O) * ΔT = (m (Al) * Ship (Al) + m (H2O ) * Sud (H2O)) * ΔT = (0.3 * 920 + 2 * 4200) * (80 – 20) = 520560 J = 520.56 kJ.
Answer: Q = 520.56 kJ.
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