In a blast furnace hematite is reduced to a sponge iron by carbon monoxide. The requirement for reduction is an excess of CO equation.
Fe2O3 + xCO = 2Fe + 3CO + (x − 3)CO
The volume ratio of the gas is CO/CO2 = 1.8
The furnace produces 800 tons Fe per 24 hours.
Coke contains 90%C and produces 2C + O2 = 2CO
Calculate:
a) The number of moles of MCO which is x
b) Coke consumption per ton Fe
c) The true CO/CO2 ratio if 200 kg of CaCO3 is added for each of tons of Fe2O3
reactions CaCO3 = CaO + CO2

Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.

Aloaded platform of total mass 500 kg is supported by a dashpot and by a set of springs of effective stiffness 72 kn/m. it is observed that when the platform is depressed through a distance x = 12.5 cm below its equilibrium position and then released without any initial velocity; it reaches its equilibrium position in the shortest possible time without overshoot. find the position and velocity of the loaded platform 0.10 sec. after its release. if a further load of 400 kg is added to the platform, find, i) the frequency of damped vibrations, and i) the amplitude of vibration after 2 complete oscillations, given that the initial amplitude is 15 cm.

The filament of an incandescent lamp has a temperature of 2000k. calculate the fraction of radiation emitted in the visible light band if the filament is approximated as blackbody