Question # 5: Propane is to be burned with 15% excess air. Before entering the furnace, the air and propane are uniformly mixed and preheated from 0 °C and 300 °C. At what rate (BTU/h) must heat be transferred to the propane-air mixture if the feed rate of propane is 3820 SCMH [m°(STP)/h]?

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