An iron iron weighing 3 kg, when connected to the electrical network, heated up from 20 to 120 degrees.

An iron iron weighing 3 kg, when connected to the electrical network, heated up from 20 to 120 degrees. How much warmth the iron received.

Task data: m (weight of the iron iron) = 3 kg; t0 (temperature of the iron before plugging in) = 20 ºС; t (final temperature) = 120 ºС.

Reference values: Czh (specific heat of iron) = 460 J / (kg * K).

The amount of heat received by the taken iron is determined by the formula: Q = Szh * m * (t – t0).

Let’s calculate: Q = 460 * 3 * (120 – 20) = 138 * 10 ^ 3 J (138 kJ).

Answer: The taken iron iron received 138 kJ of heat.