Question

сколько энергии выделится при полном сгорании керосина массой 200 г.Какое количество теплоты выделится при полном сгорании 100 кг карагандинского угля

Answer 1

31000000дж/кг*100кг=31000000000дж или 3100мдж

Ответ:3100мДж.
с (удельная теплота сгорания керосина) = 28,8 МДж/кг.

Q = cm = 28,8 * 0,2 = 5,76 МДж.

Ответ: 5,76 МДж.

Answer 2

Energy Released from Combustion of Kerosene

The amount of energy released during the complete combustion of a substance can be calculated using the heat of combustion. The heat of combustion is the amount of heat energy released when one unit of a substance is completely burned in excess oxygen.

To determine the energy released from the complete combustion of kerosene, we need to know the heat of combustion of kerosene. Unfortunately, the specific value for the heat of combustion of kerosene is not provided in the search results.

However, if we assume that the heat of combustion of kerosene is approximately 46.2 megajoules per kilogram (MJ/kg), we can calculate the energy released from the complete combustion of 200 grams of kerosene.

Using the assumption of 46.2 MJ/kg, we can calculate the energy released as follows:

1 kilogram = 1000 grams

Energy released from 200 grams of kerosene = (200 grams / 1000 grams) * 46.2 MJ/kg

Energy released from 200 grams of kerosene = 9.24 megajoules (MJ)

Please note that this calculation is based on an assumption and the actual heat of combustion of kerosene may vary. It is always best to refer to reliable sources or consult scientific literature for accurate values.

Heat Released from Combustion of Karaganda Coal

Similarly, to determine the amount of heat released from the complete combustion of Karaganda coal, we need to know the heat of combustion of Karaganda coal. Unfortunately, the specific value for the heat of combustion of Karaganda coal is not provided in the search results.

However, if we assume that the heat of combustion of Karaganda coal is approximately 24 megajoules per kilogram (MJ/kg), we can calculate the heat released from the complete combustion of 100 kilograms of Karaganda coal.

Using the assumption of 24 MJ/kg, we can calculate the heat released as follows:

Heat released from 100 kilograms of Karaganda coal = 100 kilograms * 24 MJ/kg = 2400 megajoules (MJ)

Please note that this calculation is based on an assumption and the actual heat of combustion of Karaganda coal may vary. It is always best to refer to reliable sources or consult scientific literature for accurate values.