Determine the substance to be burned if 20 kg of it gave an energy of 200 MJ.
| February 17, 2021 | education
Initial data: m (mass of the burnt substance) = 20 kg; Q (the amount of thermal energy that was obtained from the combustion of a substance) = 200 MJ (200 * 10 ^ 6 J).
The combusted substance can be determined by the value of the specific heat of combustion of the fuel: q = Q / m.
Calculation: q = 200 * 10 ^ 6/20 = 10 * 10 ^ 6 J / kg.
Answer: The burned substance is dry wood (q = 1 * 10 ^ 7 J / kg).
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.
