One kilogram of water at 0°C is changed to superheated steam of one atm pressure and 300° C. The major heat consumption in the process will be to________________?
Correct answer: C. Evaporate the water
- A. Heat the water from 0°C to 100°C
- B. To superheat the steam
- C. Evaporate the water
- D. Data insufficient, can't be predicted
Explanation
The latent heat required to vaporise water at 1 atm is about 2257 kJ/kg, much greater than the sensible heating from 0 to 100°C or the subsequent superheating. Therefore, evaporation consumes the major share of heat.
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