A/ Ethane (C2H6) is burned with atmospheric air that contains 22.87 kmole of 02 and N2, and the volumetric analysis of the dry products of combustion yields the following: 10% CO2, 1% CO, 3% 02, and 86% N2 Assuming 100 kmoles of dry products. Determine the air-fuel ratio, (1 kmole fuel). AC2H6 + 22.87(02 + 3.76N2) 10(CO2) + CO + 302 + 86N2 + c (H2O)
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- Ethene (C2H4) at 77oF undergoes complete combustion with stoichiometric air at 77oF and 70% humidity in an insulated steady-flow combustion chamber. Estimate the exit temperature assuming a pressure of 14.5 psia.What is the Molecular weight of a certain volatile liquid which is placed in 225 g flask which has total capacity volume of 252.17 mL. After the liquid was heated to 96.7 oC the gass volatilized and the weight of the flask measure 227.33g. What is the could be the MW of the volatile sample?Show solution : if 12m³ of nitrogen at constant temp of 30°c and 12kpa abs is permitted to expand to 30m³, what is the resulting pressure? Ans. 50 kpa
- A 0.064 kg of octane vapor (MW = 114) is mixed with 0.91 kg of air ( MW = 29 ) in the manifold is 86.1 kPa, and the temperature is 290 K. Assume octane behaves ideally, what is the total volume of this mixture. Show unit analysis and conversion on solution. Round off to four decimal places.1. A gas consist of 70% propane and 30% butane by volume. Find the stoichiometric air-to-fuel ratio. a. 3:14 b. 14: 3 c. 23:1 d. 1:23 2. A furnace is fired with fuel oil with a partial analysis of 7.6% S and 2.8% N. Orsat analysis of the stack gas shows 9.44% CO2, 1.19% CO, 0.4% SO2, 0.47% H2, 6.8% O2 and 81.7% N2. Air supplied is at 23 deg Celsius, 755 mmHg and 85% RH. Calculate the percent excess air. a. 55% b. 78% c. 23% d. 38%A liquid mixture containing ether CH3-O-CH3 at a ratio of 0.58 and methano; CH3OH if the total pressure of the vapor P total= 1600 K pa and the proportion of methanol in the vapor 0.36 calculate 1- PE ether steam pressure 2- PE methanol steam pressure 3- yE the proportion of ether in the steam 4- XM the proportion of methanol in the liquid 5- PM standard ratio of methanol 6- pE standard ratio of ether
- A fuel has the following volumetric analysis: CH4 = 68% C2H6 = 32% Assume complete combustion with 15% excess aur at 101.325 kPa and 27 degrees dry bulb temperature. What is the total moles in the products of combustion?. Compatible Polymers A and B are to be blended to achieve a glass-transition temperatureof 60 oC. Tg’s of Polymers A and B are 30 and 85 oC, respectively, using an appropriateequation determine the composition of the blend.1. Sodium carbonate is recovered as decahydrate from 1000kg of 5% solution of sodium carbonate in water. If it is desired that 95% of Na2CO3 is to be recovered as decahydrate by cooling to 278 K, determine the following: a) the mass of water evaporated (b) the mass of crystals obtained (Na2CO3 ∙ 10H2O). The solubility of Na2CO3 in water at 278K is 9.0% (weight) 2. A copra batch contains 44% oil and is to be extracted with n-hexane. The extracted meal contains 0.07 kg of oil/kg oil free matter and the mass fraction of n-hexane in it is 0.05. The extract contains 49% n- hexane. If 10,000 kg of copra are to be processed, how many kg of n-hexane are required and the determine the amount of extract. 3. Absorption of sulphur dioxide is carried out in a packed tower. Gas containing 14.8% sulphur dioxide and the rest inert gases enters the tower while the leaving gases contains 1% sulphur dioxide. Water flows at the rate of 1m3/min. The tower handles 7380 m3/hr of gas at 303K and 1 bar. Find…
- Liquid benzene is contained at 298K in a 2 cm diameter glass tube and maintained at a level 5 cm below the top of the tube, which is open to atmosphere. The following properties of benzene are given: 1) Boiling temperature is 353K at 1 atm. 2) MW of benzene is 78.108 kg/kmol. 3) hfg is 393 kJ/kg at 353K. 4) Density is 879 kg/m^3 5) Diffusivity rate (D) is 0.88x10^-5 m^2/s at 298K. Determine the following: A) The mass evaporation rate of benzene knowing that Psat is 0.145 atm and Yf at infinity is zero B) How long does it take to evaporate 0.5 cm^3 of benzeneDetermine the theoretical flame temperature that can beobtained by the combustion of methane with 25% excess air.Air and methane enter at 298K and a pressure of 1 atm. Thereaction is complete. Standard heat of formation at 298 inkJ/kmol are: Methane (g) = -74520, CO2 (g) = -393500, Watervapor (g) = - 241813.4.00 mol of perfect gas atoms with C p,m= 25 R is initially at 100.0 kPa, 100.0 dm3. It is heated to 150.0 dm3 at constant pressure and then heated to 150.0 kPa at constant volume. Calculate W, Q, ΔU and ΔH for this process.