Question

Сколько нужно сжечь керосина, чтобы выделилось 184 мДж теплоты?

Answer 1

Дано:

Q=10МДж=10000000Дж

q(удельная теплота сгорания керосина)=43МДж=43000000Дж

m-?

Решение:

Q=qm

m=Q/q

m=10000000/43000000=0,232кг

Ответ:0,232кг

Answer 2

Calculating the Amount of Kerosene to Release 184 mJ of Heat

To calculate the amount of kerosene needed to release 184 mJ of heat, we can use the formula:

Q = m * c * ΔT

Where: - Q = heat energy (in joules) - m = mass of the substance (in grams) - c = specific heat capacity of the substance (in J/g°C) - ΔT = change in temperature (in °C)

Given that the heat released is 184 mJ, we need to find the mass of kerosene required.

Using the Specific Heat Capacity of Kerosene

Kerosene has a specific heat capacity of approximately 2.1 J/g°C.

Calculating the Mass of Kerosene

Using the formula Q = m * c * ΔT, and rearranging it to solve for mass (m), we get: m = Q / (c * ΔT)

Substituting the given values: m = 184 mJ / (2.1 J/g°C * ΔT)

The change in temperature (ΔT) is not provided in the search results, so it's necessary to have this value to calculate the mass of kerosene required accurately.

If you have the specific value for the change in temperature, please provide it, and I can help you calculate the mass of kerosene needed to release 184 mJ of heat.