Предмет: Физика, автор: evabodnar2009

яка енергія виділилась при кристалізації та охолодженні до 135°С залізної заготовки масою 40 кг​

Ответы

Автор ответа: hello753
0

Ответ:

m =40 кг

c =460Дж/кг,C

t1 =1535C(температура плавлення)

t2 =135C

лямбдо= 27000дж/кг,C

Q1=c×m×(t1 -t2)

Q2 = лямбдо × m

Q1 +Q2 = 25760000+ 1080000= 26840000Дж=26840кдж

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