Heat of vaporization: How much energy is needed to heat 1.0 kg of mercury metal from 10.0°C to its boiling point (357°C) and vaporize it completely? For mercury, C = 140 J/kg·°C and Hv = 3.06×105 J/kg.
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Answer:
354580Joules is required to heat the mercury metal and burn it completely.
Explanation:
Given data
mercury = 1 gram
Temperature = 10.0°C to 357°C
C = 140 J/kg·°C
Hv = 3.06×10^5 J/kg.
To find
Energy required to hear mercury and vaporize it completely
Energy Required = Heat added for temperature during change in phase + Heat of vaporization.
= mass*Cp* Change in temperature
+ heat of Vaporization
= 1*140*(357-10) + 3.06×10^5 J/kg.
= 48580 + 3.06×10^5 J/kg.
=354580Joules
354580Joules is required to heat the mercury metal and burn it completely.
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