A vertical furnace is loaded with limestone and coke. Limestone is considered to be 100% CaCO3 and coke 100% carbon (C). Through the bottom of the furnace, a quantity of dry air necessary for the combustion of the coke to take place and calcination of the limestone is introduced. The furnace charge and air are introduced at 25C. On the other hand, the gases leaving the furnace are at a temperature of 400C. The lime, Cao, leaves the oven at 520C (containing no undecomposed carbon or carbonate). During the process, radiation losses are neglected and the flow diagram of the process is shown in Figure 1. It is desired to know the CaCO3/coke ratio required in the furnace charge. The reactions that occur in the homo are the following: C+0.CO CaCO3 + CO2 + Cao In addition, data for both heat of formation and heat capacities at standard conditions (1 atm and 25C) are provided. CO2 Components Heats heat capacities N LOOPC of formation (Kcal/mol) -288.45 0.196 cal/g C) Caco 2500 100 kg/hr Kiln Cao - 151.7 0.215 cal/g C) CO2 -94,052 10,776 cal/mole C) N 7.159 cal/mole C) 125C 75 kg/hr Oz N 25C O2 7.792 cal/mole "C) 5204C 0.1696 cal/g C) Table 1. Heat of formation and heat capacity of each component Reaction efficiency 100%