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Simran Bhatia Grade: 11
        Liquid-nitrogen container is made of a 1 cm thick thermocoal sheet having thermal conductivity 0.025 J/m-s-°C. Liquid nitrogen at 80 k is kept in it. A total area of 0.80 m2 is in contact with the liquid nitrogen. The atmospheric temperature is 300 K. Calculate the rate of heat flow from the atmosphere to the liquid nitrogen.
3 years ago

Answers : (1)

Aditi Chauhan
askIITians Faculty
396 Points
										Sol. t = 1 cm = 0.01 m, A = 0.8 m^2

θ base1 = 300, θ base 2 = 80
K = 0.025,
Q/t = KA(θ base 1 – θ base 2)/l = 0.025 * 0.8 * (30030)/0.01 = 440 watt.
3 years ago
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