Предмет: Физика, автор: elvira200574

Помогите пожалуйста ! Физика !
Рассчитайте массу керосина который потребуется сжечь для того, чтобы нагреть 9,2 кг воды от 10 до 80 градусов C , если считать , что вся энергия , выделенная при сгорании керосина пойдёт на погрев воды . Ответ представьте целым числом граммов

Приложения:

Ответы

Автор ответа: n1k50n
7

Объяснение:

Дано:

m₂ = 9,2 кг

t₁ = 10 °c

t₂ = 80 °c

c = 4200 Дж/(кг * °c)

q = 4,6*10^{7}[/tex] Дж/кг

m₁ - ?

Решение:

Q₁ = Q₂

Q₁ = qm₁

Q₂ = cm₂(t₂-t₁)

qm₁ = cm₂(t₂-t₁);

m = \frac{4200*9,2*70}{4,6*10^{7}}

m₁ = 0,0588 кг = 588 г.

Ответ: 588 грамм.

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