When a body weighing 2 kg was heated from 10 ° to 30 °, 5600 J of heat was consumed.
| February 16, 2021 | education
When a body weighing 2 kg was heated from 10 ° to 30 °, 5600 J of heat was consumed. Find the specific heat of a substance, determine what kind of substance it is.
Data: m (heated body mass) = 2 kg; t1 (initial body temperature) = 10 ºС; t2 (final temperature) = 30 ºС; Q (consumed heat) = 5600 J.
To determine the type of substance from which the heated body was made, we apply the formula: Q = C * m * (t2 – t1) and C = Q / (m * (t2 – t1)).
Calculation: C = 5600 / (2 * (30 – 10)) = 5600/40 = 140 J / (kg * K).
Answer: The heated body was made of lead, which has a specific heat of 140 J / (kg * K).
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