How much energy must be expended to convert 200 g of mercury at a temperature of 357 degrees
| February 5, 2021 | education
How much energy must be expended to convert 200 g of mercury at a temperature of 357 degrees Celsius into a gaseous state?
To calculate the cost of thermal energy for vaporization of the taken mercury, we use the formula (we take into account that the temperature of 357 ºС is the temperature of the beginning of vaporization for mercury): Q = L * m.
Constants and variables: L – specific heat of vaporization of mercury (L = 0.3 * 10 ^ 6 J / kg); m is the mass of mercury (m = 200 g = 0.2 kg).
Calculation: Q = L * m = 0.3 * 10 ^ 6 * 0.2 = 0.06 * 10 ^ 6 J = 60 kJ.
Answer: To convert 200 g of mercury into a gaseous state, 60 kJ of thermal energy is required.
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