Determine the mass of molten steel if it took 16.8 × 10 ^ 3J of heat to melt it.
| April 19, 2021 | education
To calculate how much heat Q the steel should receive, taken at the melting temperature for transition to the liquid state, we use the formula Q = λ • m, where the mass of steel is m kg, the specific heat of melting of steel λ = 0.084 MJ / kg. Since it is known that it took Q = 16800 J to melt the steel, we express from the formula the mass of molten steel m = Q: λ. Substitute the values of physical quantities into the formula and calculate m = 16800 J: 84000 J / kg; m = 0.2 kg.
Answer: the mass of molten steel is m = 0.2 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.
