What mass of kerosene needs to be burned in order to obtain the same amount of energy as it is released

| August 12, 2021 | education

What mass of kerosene needs to be burned in order to obtain the same amount of energy as it is released during the combustion of coal weighing 500 g. (Specific heat of combustion of kerosene 46 * 10 in the power of 6 J / kg, coal 30 * 10 in the power of 6 J / kg)

Problem data: m2 (mass of burnt coal) = 500 g.

Reference data: according to the condition of the problem q1 (specific heat of combustion of kerosene) = 46 * 10 ^ 6 J / kg; q2 (specific heat of combustion of coal) = 30 * 10 ^ 6 J / kg.

SI: m = 500 g = 0.5 kg.

Let’s compose an equation to determine the corresponding mass of kerosene: m1 * q1 = m2 * q2, whence m1 = m2 * q2 / q1 = 0.5 * 30 * 10 ^ 6 / (46 * 10 ^ 6) = 15/46 = 0.326 kg or 326 BC

Answer: To replace coal, you will need to burn 326 grams of kerosene.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.