Предмет: Физика, автор: nikitosmoh1301

Яка кількість теплоти необхідна на нагрівання олії масою 300г від 20°С до 50°С?
срочно!!!

Ответы

Автор ответа: s40569515
1

Ответ:

Ответ: 941920Дж

Объяснение:

Дано:

m1=300г=0,3кг

V=2л=0,002м³

ρ=920кг/м³

t1=20°C

t2=310°C

c1=400Дж/кг°С

с2=1700Дж/кг°С

--------------------

Q=c1*m*(t2-t1)+c2*V*ρ*(t2-t1)=400*0,3*(310-20)+1700*0,002*920*(310-20)=34800+907120=941920Дж

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