1. What is molality? 2. 1 atmospheric pressure = ----- Psi. 3. What is the equivalent weight of Al (SO ) .243
[3 marks]In double effect evaporator plant the second effect is maintain under vacuum of 475torr (mmHg).find the absolute pressure in kgf/cm2 kpa, atm, bar. ,
[4 marks]Asolution of caustic soda in water contains 20%NaOH (by weight) at333K (60oC).The density of the solution is 1.196kg/l.Find the molarity, normality and molality of the solution.
[7 marks]Calculate the weight of 1 m3 of chlorine gas at a temperature of25oC and a pressure of 745mmHg.
[3 marks]How are you calculate the density of gas mixture?
[4 marks]The analysis of a sample of glass yields 7.8%Na O,2 7%MgO, 9.7%ZnO, 2.0%Al O , 8.5%B Oand 65%SiO (by wt.).convert this composition into mole%.
[7 marks]Cracked gas from a petroleum refinery has the following composition by volumeMethane45%, Ethane10%, Ethylene25%, propane7%, propylene8%, n- Butane5%Find (a) the average Mol.wt. Of gas Mixture.
[7 marks]The composition by wt. and (c) Specific gravity of the gas mixture.
[ marks]Define the following terms: (1) excess reactant (2) percentage conversion (3) yield
[3 marks]Discuss about recycling operations.
[4 marks]It is required to make 1000kg mixed acid containing 60% H SO , 32%HNO and 8% water by blending (i) the spent243 acid containing 11.3% HNO , 44.4% H SO and 44.3%324 H O. (ii) Aqueous 90% HNO and (iii) aqueous 98%23 H SO All percentages are by weight. Calculate the 2 4. quantities of each of the three acids required for blending.
[7 marks]03 Explain the following terms with reference to chemical process (1) Process flow sheet (2) P & Idiagram (3) Degree of freedom
[ marks]Using Antoine equation, Calculate vapour pressure of Acetaldehyde (C2H4O) at 250K Antoine constants for acetaldehyde are A = 7.134, B = 1600, C = 18.65.
[4 marks]Soybean seeds are extracted with hexane in batch exctractors.The flacked seeds contains 18.6% oil, 69.0% solids & 12.4% moisture cake. At the end of the extraction process the cake is separated from the hexane oil mixture. The cake analysis yields, 0.8%oil, 87.8%solids and 11.5% misture.Find the% recovery of oil .All percentage are on wt. basis.
[7 marks]Calculate the heat of reaction of the following reaction. 4NH (g) +5O (g) 4NO(g) +6H O(g)322 Data : Component ∆HOcal/ gmol f NH (g) -110203 NO(g) 21570 H O(g) -577962
[3 marks]In a textile mill, a double effect evaporator system concentrates weak liquor containing 4% (by weight) caustic soda to produce a lye containing 25% solids (by weight).Calculate the evaporation of water per 100 kg feed in the evaporator.
[4 marks]What will be the yield of Glauber salt (Na SO .10H O) if242 a pure 32% solution is cooled to 293K (20oC) without any loss due to evaporation? Data: Solubility of Na SO in24 water at 293K (20oC) is 19.4kg per 100 kg water.
[7 marks]Calculate the heat of formation of glycerol liquid (C 3 H 8 O 3 ) at 298 Kfrom its elements using Hess’s law. Data: Heat of formation of CO = (-393.51 kJ/mol), Heat of formation of 2 (g) H O = (-285.83 kJ/mol), Heat of combustion of glycerol 2 (l) liquid at 298 K= (-1659.10 kJ/mol).
[3 marks]Define: (1) Heat of reaction (2) Heat of combustion (3) Std. heat of formation (4) Heat capacity.
[4 marks]Temperature of pure Oxygen is raised from 350 to 1500K. calculate the amount of heat to be supplied for raising the temperature of 1 kmol oxygen using the following Cpo data Cpo = a + bT +cT2 +dT3 KJ/Kmol K a b x 103 c x 106 d X 109 26.0257 11.7551 – 2.3426 -0.5623
Define: Crystallization, Extraction and adsorption.
[3 marks]Define :( 1) Absolute humidity (2) Humid Heat (3) Humid volume (4) Percentage humidity.
[4 marks]The dry bulb temperature and dew point of a ambient air were found to be 302K (29 C) and 291K (18oC) respectively. The barometer records 100 kpa a(750torr)2 Compute (a) the absolute molal humidity (b) the absolute humidity (c) the % RH (d) the % saturation € the humid heat and (f) the humid volume.
[7 marks]Discuss ultimate analysis of coal.
[3 marks]Describe the classification of fuels.
[4 marks]The Or sat analysis of the flue gases from a boiler house chimney gives CO2 11.2%, O2:4.2% and N2 84.4 %( mole %). Assuming that complete combustion has taken place, (a) calculate the % excess air and (b) find the C: H ratio in the fuel.
[7 marks]