Liquid helium has a very low boiling point 4.2K as well as low latent heat of vaporization, equal to 2.09 x 10⁴ J/kg. What is the boiling time for 2 kg of liquid helium by a 100W heater.
A 6.97 min
B 6.35 min
C 5.92 min
D 6.57 min
Solution
Correct Answer: Option A