Question: A fire starts in a warehouse storing polystyrene (PS). The surface area of polystyrene involved in the fire increases according to A=0.002 t, where

A fire starts in a warehouse storing polystyrene (PS). The surface area of polystyrene involved in the fire increases according to A=0.002 t, where t is time in seconds and A is area in m. The fire area remains constant after 30 s and the radiation fraction is 0.3. The burning flux of polystyrene is 38 g/(m.s), the heat of combustion is 27 kJ/g and CO yield is 0.06 g/g. a) What is the yield and production rate of CO 30 s after ignition? b) What is the mass concentration of CO in the smoke plume at a height of 4 m from the surface of the burning polystyrene at steady state?

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