Question

СРОЧНО ДАМ ВСЕ БАЛЫ ЧТО ЕСТЬ Печь, КПД которой составляет 40 %, поставили в комнату с площадью пола 16 и высотой стен 2,5 м. После чего загрузили в неё некоторое количество древесного угля. При этом воздух в комнате нагрелся на 10 . Какое количество угля сожгли в печи?

Answer 1

Ответ:

0,041кг. Если нужна не масса то я не знаю.

Объяснение:

смотри в прикрепленных. будут вопросы- пиши

Answer 2

Calculation of the Amount of Coal Burned in the Stove

To calculate the amount of coal burned in the stove, we need to consider the efficiency of the stove and the change in temperature of the air in the room.

Given: - Efficiency of the stove (KPD) = 40% - Floor area of the room = 16 square meters - Height of the walls = 2.5 meters - Change in temperature of the air in the room = 10 degrees Celsius

To calculate the amount of coal burned, we can use the formula:

Amount of coal burned = (Heat gained by the air) / (Heat value of the coal)

To calculate the heat gained by the air, we can use the formula:

Heat gained by the air = (Volume of the room) x (Density of air) x (Specific heat capacity of air) x (Change in temperature)

To calculate the volume of the room, we can use the formula:

Volume of the room = (Floor area of the room) x (Height of the walls)

Let's calculate each component step by step.

1. Calculate the volume of the room: - Floor area of the room = 16 square meters - Height of the walls = 2.5 meters - Volume of the room = (16 square meters) x (2.5 meters) = 40 cubic meters

2. Calculate the heat gained by the air: - Volume of the room = 40 cubic meters - Density of air = 1.225 kg/m^3 (at standard conditions) - Specific heat capacity of air = 1005 J/(kg·K) (at constant pressure) - Change in temperature = 10 degrees Celsius - Heat gained by the air = (40 cubic meters) x (1.225 kg/m^3) x (1005 J/(kg·K)) x (10 degrees Celsius) = 489,000 Joules

3. Calculate the amount of coal burned: - Efficiency of the stove (KPD) = 40% = 0.4 - Heat value of the coal (depends on the type of coal used) - not provided in the question - Amount of coal burned = (489,000 Joules) / (Heat value of the coal)

Unfortunately, the heat value of the coal is not provided in the question, so we cannot calculate the exact amount of coal burned without this information. The heat value of coal can vary depending on the type and quality of the coal used.

Please provide the heat value of the coal so that we can calculate the amount of coal burned in the stove accurately.