liquid helium has a very low boiling point, 4.2K, as well as a low latent heat
of vaporization, 2.09x10^4 J/kg. If energy is transferred to a container of
liquid helium at the boiling point from an immersed electric heater at a rate
of 6.0 W, how long does it take to boil away 1.5 kg of the liquid?
physics about heat
2010-04-05 12:13 am
回答 (1)
2010-04-05 12:50 am
✔ 最佳答案
Heat required to boil away 1.5 kg of liquid helium= 1.5 x 2.09x10^4 J = 31350 J
Time required = 31350/6 s = 5225 s = 1.45 hours
收錄日期: 2021-04-29 17:33:45
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