The problem involves finding the outer surface temperature (Ts) of a spherical reaction vessel containing an exothermic reaction that produces heat at a specified volumetric rate. Convection effects are negligible, and the emissivity of the outer surface is 0.78. The spherical vessel has an inner radius of 1 metre and an outer radius of 1.1 metres. You can assume a surrounding temperature of 5 oC and thermal energy generated per unit volume of 50 kW m-3.