Answer to Question #241523 in Molecular Physics | Thermodynamics for Unknown346307

Question

Liquid oxygen (boiling temperature = – 182°C) is to be stored in spherical

container of 30 cm diameter. The system is insulated by an evacuated space between inner sphere and

surrounding 45 cm inner diameter concentric sphere. For both spheres ε = 0.03 and temperature of the

outer sphere is 30°C. Estimate the rate of heat flow by radiation to the oxygen in the container

Answer 1

The rate of heat transfer by emitted radiation is determined by the Stefan-Boltzmann law of radiation: Qt=σeAT4, where σ = 5.67 × 10−8 J/s · m2 · K4 is the Stefan-Boltzmann constant, A is the surface area of the object, and T is its absolute temperature in kelvin.