How much heat is needed to melt a 240-gram tin if its initial temperature is 22 degrees.
| May 30, 2021 | education
Data: m (mass of taken tin) = 240 g (0.24 kg); t (initial tin temperature) = 22 ºС.
Reference values: C (specific heat of tin) = 230 J / (kg * K); tmelt (temperature of the beginning of tin melting) = 231.9 ºС; λ (specific heat of fusion) = 59 * 103 J / kg.
The required amount of heat for heating and melting 240 g of tin is calculated by the formula: Q = C * m * (tmelt – t) + λ * m.
Calculation: Q = 230 * 0.24 * (231.9 – 22) + 59 * 103 * 0.24 = 25746.48 J.
Answer: You need 25746.48 J of heat.
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