Calculate the quantity required for heating a cast iron weighing 1.5 kg to measure its temperature at 200C.

To calculate the cost of heat for heating the cast iron used, we apply the formula: Q = Cch * m * Δt.

Constants and variables: Cch – specific heat capacity of cast iron (Cch = 540 J / (kg * K)); m is the weight of the iron (m = 1.5 kg); Δt – considered temperature change (Δt = 200 ºС).

Calculation: Q = Ch * m * Δt = 540 * 1.5 * 200 = 162 kJ (162 * 10 ^ 3 J).

Answer: To heat the iron used, 162 kJ of heat is required.