Process Calculation — Summer 2021

1) Define relative humidity 2) 1 atm = ___________ bar. 3) What is molality?

1) ) In double effect evaporator plant the second effect is maintain under vacuum of 475torr (mmHg).find the absolute pressure in kpa 2) Converted a Pressure of 2 atm to mm Hg.

Define: (1) limiting reactant (m2)a sinelteacinti vuintdye r vacuum of 475torr (mmHg).find the absolute pressure in kpa (3) excess reactant (4) law of conservation of energy (5) yield (6) latent heat of vaporization (7) calorific value of fuel

Discuss the methods for solving problems of material balance without chemical reactions

The conductance of a fluid flow system is defined as the volumetric flow rate, Referred to a pressure of one torr (133.233 Pa). For an orifice, the conductance C can be computed from C= 89.2 A (T/M)1/2 ft3/ s where, A = area of opening, ft2 , T = temperature, 0R, M = Molar mass Convert the empirical equation in SI units.

Asolution of caustic soda in water contains 20% NaOH (by weight) at 333 K. The density of the solution is 1.196kg/l. Find the molarity, normality and molality of the solution.

20 g of caustic soda are dissolved in water to Prepare 500 ml of solution. Find the normality and molality of the solution.

Define the following terms: (1) excess reactant (2) percentage conversion (3) yield.

Discuss about recycling operations

It is required to make 1000 kg mixed acid containing 60% H SO , 32% HNO243 and 8% water by blending (i) the spent acid containing 11.3 % HNO , 44.4%3 H SO and 44.3 % H O. (ii) Aqueous 90% HNO and (iii) aqueous 98 % H SO . All percentages are by mass. Calculate the quantities of each of the24 three acids required for blending OR1

Discuss about By Pass operations

Write a short Note on Material Balance and Energy Balance

Soybean seeds are extracted with hexane in batch extractors. The flaked 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 % moisture. Find the% recovery of oil .All percentage is on weight basis.

Define and explain the following terms: (1) Heat of formation (2) Heat of combustion (3) Heat of reaction

Define Raoult’s law. What are the applications and limitations of Raoult’s law?

Temperature of pure Oxygen is raised from 350 to 1500 K. 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) Gas a b x 103 c x 106 d x 109 0 26.0257 11.7551 -2.3426 -0.56232

Discuss methods of solving material balance problems without chemical reaction

Describe Pressure-Enthalpy chart for any pure component. What is the value of latent heat of vaporization at critical point? Why?

2000 kg of wet solids containing 70 % solids by weight are fed to a tray dryer where it is dried by hot air. The product finally obtained is found to contain 1% moisture by weight, calculate: (1). The kg of water removed from wet solids, (2). The kg of product obtained

Discuss methods of solving material balance problems with chemical reaction

Discuss about proximate analysis of fuel.

Pure methane gas is heated from 303K to 523K at atmospheric pressure. Calculate the heat added per kmole methane using Cp0 data given below Cpo = a + bT +cT2 +dT3 KJ/ (Kmol. K) Gas a b x 103 c x 106 d x 109 C0 19.2494 52.1135 11.973 -11.31732

Define:

Dry blub temperature (ii) wet bulb temperature (iii) Dew point.

Explain: (i) Watson equation (ii) Riedel Equation

10,000 kg/h of solution containing 20 % methanol is continuously fed to a distillation column. Distillate (Product) is found to contain 98% methanol and waste solution from the column carries 1% methanol. All percentages are by weight. Calculate (1) The mass flow rate of distillation and bottom product. (2) The percentage loss by methyl alcohol.