How much heat is needed to heat 100 g of lead from 10 to 20 degrees. Specific heat capacity of copper 370 J / kg * С
Data: m (mass of heated copper) = 100 g (0.1 kg); t1 (copper temperature before heating) = 10 ºС; t2 (final temperature of copper heating) = 20 ºС.
Reference values: according to condition С (specific heat capacity of copper) = 370 J / (kg * ºС); for lead С = 140 J / (kg * ºС).
The required amount of heat for heating copper is calculated by the formula: Q = C * m * (t2 – t1).
Calculation: Q = 370 * 0.1 * (20 – 10) = 370 J (for lead Q = 140 J).
Answer: To heat copper, 370 J of heat is required (for lead – 140 J).
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