Question

Визначте кількість теплоти яка йде на обігрівання кімнати каміном якщо при повному згоранні дров у камінні виділяется 45 мджтеплоти ккд камінна 15%

Answer 1

15% это 0,15
45 МДж=45 000 000 Дж
Q=45 000 000•0,15=6750000 Дж

Answer 2

Calculation of Heat Energy Released by the Fireplace

To calculate the amount of heat energy released by the fireplace for heating a room, we need to consider the heat energy released during the complete combustion of the firewood and the efficiency of the fireplace.

Given: - Heat energy released during complete combustion of firewood in the fireplace: 45 MJ - Efficiency of the fireplace: 15%

To find the amount of heat energy that goes into heating the room, we can use the formula:

Heat energy for heating the room = Heat energy released during combustion / Efficiency

Substituting the given values into the formula:

Heat energy for heating the room = 45 MJ / 0.15

Calculating the result:

Heat energy for heating the room = 300 MJ

Therefore, the amount of heat energy that goes into heating the room with the fireplace is 300 MJ.

Please note that this calculation assumes that all the heat energy released during combustion is effectively used for heating the room, which may not be the case in real-world scenarios due to heat loss through ventilation, insulation, and other factors.