The following is an analysis of coal in percent: C-74, H2-6, O2-8, N2-1.6, S-1, ASH-9.4. If burned for steam boiler coal produces the following (ORSAT) in percent CO2-12,CO-0.1, O2-6.5.The refuse contain 0.008kg of carbon per kg of burnt. Determine the excess air in percent used.

Please use SI units and state which corellation is used

Calculate the change in enthalpy ΔH for 100 kg of material undergoing the following temperature and phase changes.  Show your calculations in detail (including the integrations) type them out in word. Ammonium sulfate (crystalline) heated from 10 °C to 40 ° Heat Capacity, i think i did it wrong, i used the values on the bottom table, i think im supposed to use value from the top...

Portland Cement is manufactured by the dry process conforming to the following specifications: Lime Saturation Ratio: - (CaO +1.5 Mg0 - 0.7 SO3)100 2.85 SiO₂ + 1.18Al2O3 + 0.65 Fe₂03 92 Iron Ratio = Al₂O3 = 2 Fe₂03 Magnesia, MgO should not exceed 1.5% and Sulfur as SO3 is 2.2% by wt Silica content of 24% by wt is acceptable The above cement is manufactured in a rotary kiln using limestone and clay as raw materials mixed in 75:25 proportion by weight. Analysis of Raw Materials Component Limestone,% Clay, % CaO 54.5 7.13 Fe₂O3 0.42 7.68 Al₂O3 0.83 17.15 SiO₂ 1.72 55.14 MgO 0.85 2.16 CO₂ 41.68 10.74 100 100 In the kiln, coal is added to supply heat of combustion. Coal contains 67.2%C, 4% H, 1.7% S, 2.2% 0, 2.6% H₂O and 22.3% ash. Its gross calorific value is 25.62 MJ/kg on a dry ash-free basis. Air supplied is 10% in excess at 27°C, 100 kPa and 75% RH. The stack gas contains 23.5% CO₂. The clinker is cooled and gypsum (essentially pure CaSO4) amounting to 3% its mass is added. The final…

A thick plate of 0.3 wt% C steel is to be carburized at 930 °C. The carburizing gas used holds the surface concentration at 1 wt% C. (a) Determine how long it will take for the C concentration to reach 0.6 wt% at a depth of 0.3 mm. (b) How long will it take to double the depth at which this concen- tration is reached? (Do not re-calculate the answer from scratch.) (c) By how much would the time in part (a) be changed if the tem- perature were raised by 50°C? (As before, do not re-calculate the answer from scratch.)

Consider an aerobic production of acetic acid (P) from ethanol (S) using Acetobacter aceti bacteria. Acetobacter aceti bacteria are added to vigorously-aerate medium containing 16 g/L ethanol. 3 g/L acetic acid is produced after 10 hours . Given the yield coefficient (YS/P) of 1.5, what is the concentration of ethanol after 10 hours ? Report your answer with two decimal places.