Question: answer wuicly for thumbs up (a) Limestone is burnt in a kiln where conversion is 70% : CaCO3CaO+CO2 (i) What is the composition (mass%) of

answer wuicly for thumbs up answer wuicly for thumbs up (a) Limestone is burnt in a kiln

(a) Limestone is burnt in a kiln where conversion is 70% : CaCO3CaO+CO2 (i) What is the composition (mass\%) of the solid withdrawn from the kiln? (ii) How many kg of CO2, are produced per kg of CaCO3 fed? Atomic Weights: Ca40;C12;016 (10 marks) (b) When pure carbon is burnt in air, some of it oxidizes to CO2, and some to CO. If the molar ratio of N2, to O2, is 7.18 and the ratio of CO to to CO2 is 2.0 in the product gas, what is the per cent excess nir used? The exit gases contain only N2,O2,CO and CO2 Assume air is 79 mole\% nitrogen and 21 mole\% oxygen. (15 marks)

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