Given: m (mass of cooled copper) = 5 kg; t1 (copper temperature before cooling) = 715 ºС; t2 (end temperature) = 15 ° C.
Constants: Cm (specific heat of copper) = 400 J / (kg * K).
The heat that copper will give up during cooling is calculated by the formula: Q = Cm * m * (t1 – t2).
Let’s calculate: Q = 400 * 5 * (715 – 15) = 400 * 5 * 700 = 1.4 * 10 ^ 6 J (1.4 MJ).
Answer: When cooled, the taken copper will give up 1.4 MJ of heat.
One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.