The temperature of zinc is 80 degrees Celsius, and the mass is 730 g, how much heat is required
| May 26, 2021 | education
The temperature of zinc is 80 degrees Celsius, and the mass is 730 g, how much heat is required to heat zinc to its melting point.
These tasks: t (zinc temperature before heating) = 80 ºС; m (mass of zinc taken) = 730 g (0.73 kg).
Reference values: Cs (specific heat of zinc) = 400 J / (kg * K); tmelt (temperature of the beginning of zinc melting) = 419.5 ºС.
The amount of heat for heating zinc from 80 ºС to the melting temperature is determined by the formula: Q = Сц * m * (tmelt – t).
Calculation: Q = 400 * 0.73 * (419.5 – 80) = 99 134 J ≈ 99.1 kJ.
Answer: To heat 730 g of zinc to the melting point, 99.1 kJ of heat is required.
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