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In the storage of flammable liquids, if the composition of the vapor-air mixture above the liquid surface falls within the flammability limits, a floating roof tank would need to used or the tank blanketed with inert gas. Check if the vapor composition for the liquids below will fall within their flammability range at atmospheric pressure and (i) 5°C and (ii) 25°C.
(a) Ethanol
(b) N-Heptane
(c) Nitrobenzene
(d) Gasoline
What is the confidence interval for probability levels of 0.95 and 0.99?
The standard enthalpy of formation of H2O(l) at 298 K is 285.8 kJ/mol. Calculate the change in internal energy for the following process at 298 K and 1 atm: H2O(l) yields H2(g)+12 O2(g);
Devise a control system for this reactor, and draw up a preliminary piping and instrument diagram. The following points need to be considered:
The molar specific heat of many materials at low temperatures is found to obey the Debye law C_v = A[T/theta]^3 where A is a constant equal to 1.94 x 10^3 Jmol^-1K^-1 and with the Debye temperature theta taking different values for different mater..
Compute the increase in temperature and entropy if saturated liquid water at 10 kPa is pumped to a pressure of 9.0 MPa, if the pump is 75% efficient (where 100% efficiency would be reversible). You may use constant values and at these conditions.
a. How many design variables must be specified in order to calculate the output stream compositions and flow rates? b. How would you optimize these variables if the objective of the separator was to maximize recovery of condensable components into ..
Apply linear programming to this problem. A firm wants to determine how many units of each of two products (products X and Y) they should produce in order to make the most money. The profit from making a unit of product X is $190 and the profit fr..
At 50 °C the system acetone(1) and chloroform(2) forms an azeotrope with composition x1 = 0.416. What is the pressure at the azeotropic composition at 50 °C?
determine the unknown process variables.
The heat capacity at constant pressure of hydrogen cyanide is given by the expression Cp[J/(mol ·°C)] = 35.3 + 0.0291T(°C) (a) Write an expression for the heat capacity at constant volume for HCN, assuming ideal gas behavior.
Fresh rainwater or surface water contains enough tritium ( ) to show 5.5 decay events per minute per 100. g of water. Tritium has a half-life of 12.3 years. You are asked to check a vintage wine that is claimed to have been produced in 1946.
Two different porous catalyst particles having equal surface to volume ratios and pore areas are used to carry out a liquid phase reaction with a first order reaction rate- one is disk-shaped with thickness B=4 mm and diameter d=48 mm while the other..
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