Propane (C 3H 8) burns completely with 190% of theoretical air entering at 74°F, 1 atm, 50% relative humidity. The dry air component can be modeled as 21%O2 and 79% N2 on a molar basis. The combustion products leave at 1 atm. Step 1 For complete combustion of propane(C3H 8) with the theoretical amount of air, what is the number of moles of oxygen (O2) per mole of fuel?

Layers %R AT Surface Ts 1. Inside air film 20 0.037 2. hardboard, medium density 25mm 0.073 3. concrete blocks, rectangular core:lightweight aggregate 2 core 200mm 0.118 4. expanded poystyrene molded beads 100mm 0.764 5. Outside air film in vented cavity 0.009 What is the AT of the above shown wall for layer 4 (expanded polystyrene molded beads 100mm)? The inside air temperature is +20°C, and the outside air temperature is -4°C. The units for your answer are °C, and your answer is correct if it is within 10% of the correct answer.

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