How much water at 100 ° C can be evaporated if we assume that all the energy released
| September 19, 2021 | education
How much water at 100 ° C can be evaporated if we assume that all the energy released during the combustion of 100 g of gasoline goes to this process?
To calculate the desired mass of evaporated water, we will use the equality (no heat loss): L * mw = qb * mb, whence we express: mw = qbd * mb / L.
Values of variables and constants: qb – heat of combustion of gasoline (qb = 4.6 * 10 ^ 7 J / kg); mb is the mass of burnt gasoline (mb = 100 g = 0.1 kg); L is the specific heat of vaporization of water (L = 2.3 * 10 ^ 6 J / kg).
Calculation: mw = qbd * mb / L = 4.6 * 10 ^ 7 * 0.1 / (2.3 * 10 ^ 6) = 2 kg.
Answer: It will be possible to evaporate 2 kg of water.
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