Предмет: Физика, автор: pushaaa07

Какое количество энергии затратили при кипячении 3 кг воды, имевшей температуру 10 ºС, если при этом образовалось 10 г водяного пара?

Ответы

Автор ответа: kornilovamilashka
1
Количество теплоты Q1, необходимое для нагревания воды, выразим формулой: Q1 = C * m * (t2 - t1). Q1 = 4200 Дж/кг*°С * 3,3 кг * (100 °С - 10 °С) = 1247400 Дж. Количество теплоты Q2, необходимое для превращения воды в пар, выразим формулой: Q2 = q * m. Q2 = 2,3 *106 Дж/кг * 3,3 кг = 7590000 Дж. Q = 1247400 Дж + 7590000 Дж = 8837400 Дж.
Похожие вопросы
Предмет: Английский язык, автор: Бурум
Помогите с тестом!!!

We gave …a meal.

a) at the visitors

b) for the visitors

c) the visitors

I think I’ll buy these shoes. … really well.

a) they fit

b) they have fit

c) they’re fitting

My arms are aching now because … since two o’clock.

a) I’m swimming

b) I swam

c) I’ve been swimming

What did you leave the meeting early … ? – I didn’t feel very well.

a) away

b) because

c) for





Cornwall is in … of England

a) south-west

b) the south-west

c) the west-south



Cars and factories … the air.

a) protect

b) waste

c) pollute

Don’t throw that old paper in the bin. You should … it.

a) recycle

b) waste

c) save

Pandas and whales are both … animals.

a) dangerous

b) endangered

c) dangerously

I work hard because I don’t want to … my exams.

a) pass

b) get

c) fail



My sister got a … in English from Oxford University.

a) degree

b) grade

c) course

I’ve lost the key. I ought … it in the safe place.

a) to be putting

b) to have put

c) to put

We can’t go along here because the road is … .

a) been repaired

b) being repaired

c) repaired

The driver was arrested for failing … an accident.

a) of report

b) reporting

c) to report

My father is not only the town mayor, he runs … , too.

a) a business

b) business

c) some business

Adrian takes no interest in clothes. He’ll wear … .

a) a thing

b) anything

c) something

All the guests were dancing. … having a good time.

a) all were

b) everyone was

c) someone was

The government is doing nothing to help … .

a) the poor

b) the poors

c) the poor ones

I … missed the bus. I was only just in time to catch it.

a) mostly

b) near

c) nearly

The village is … Sheffield. It’s only six miles away.

a) along

b) by

c) near

My father used the money he won to set … his own company.
ту.

a) on

b) out

c) up
Предмет: Химия, автор: kirillprotasow13
Предмет: Химия, автор: Dasha6656785228