A steel bar weighing 4 kg was heated, while 200,000 J of heat was expended, determine the final body

A steel bar weighing 4 kg was heated, while 200,000 J of heat was expended, determine the final body temperature if the initial temperature is 10 °

Initial data: m (weight of a steel bar) = 4 kg; Q (spent heat for heating the bar) = 200,000 J; t0 (initial temperature of the steel bar) = 10 ºС.

Reference values: C (specific heat capacity of steel) = 500 J / (kg * K).

The temperature to which the steel bar will be heated is determined from the formula: Q = C * m * (t – t0), whence t = Q / (C * m) + t0.

Let’s calculate: t = 200,000 / (500 * 4) + 10 = 100 + 10 = 110 ºС.

Answer: The steel bar will be heated to a temperature of 110 ºС.