What mass of coal must be burned to get 8.7 * 10 ^ 7 J of energy? The specific heat of combustion
| January 27, 2021 | education
What mass of coal must be burned to get 8.7 * 10 ^ 7 J of energy? The specific heat of combustion of coal is 2.7 * 10 ^ 7 J / kg.
The mass of bituminous coal burned can be calculated from the following formula:
Q = q * m, where Q is the amount of heat that needs to be obtained when burning coal (Q = 8.7 * 10 ^ 7 J), q is the specific heat of combustion of coal (according to the condition q = 2.7 * 10 ^ 7 J / kg), m is the required mass of coal for combustion.
m = Q / q.
Let’s do the calculation:
m = Q / q = 8.7 * 10 ^ 7 / 2.7 * 10 ^ 7 = 3.22 kg.
Answer: To obtain a given amount of heat, 3.22 kg of coal must be burned.
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.
