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Methane is burned completely with 40% excess air. The methane enters the combustion chamber at 25°C, the combustion air enters at 150°C, and the stack gas [CO2, H2O(v), O2, N2] exits at 450°C. The chamber functions as a preheater for an air stream flowing in a pipe through the cham...
Ammonia is oxidized in a well-insulated continuous reactor. The feed stream enters at 200°C and the products leave at temperature Tout(°C). The inlet-outlet enthalpy table for the reactor appears as follows. (a) Draw and label a process flowchart and calculate the molar amounts of t...
A culture of the fungus aspergillus niger is used industrially in the manufacture of citric acid and other organic species. Cells of the fungus have an ultimate analysis of CH1.79N0.2O0.5, and the heat of formation of this species is necessary to approximate the heat duty for the bior...
You are about to dilute 2.00 mol of 100% sulfuric acid with enough water to produce a 30 mole% aqueous solution. The acid and water are initially at 25°C. (a) How much heat would have to be removed to keep the final solution at 25°C? (b) Suppose the flask has a mass of 150 g, and th...
Saturated propane vapor at 2.00 × 102 psia is fed to a well-insulated heat exchanger at a rate of 3.00 × 103 SCFH (standard cubic feet per hour). The propane leaves the exchanger as a saturated liquid (i.e., a liquid at its boiling point) at the same pressure. Cooling water enters t...
A gas stream containing acetone in air flows from a solvent recovery unit at a rate of 142 L/s at 150°C and 1.3 atm. The stream flows into a condenser which condenses most of the acetone, and the liquid and gas outlet streams are in equilibrium at - 18°C and 5.0 atm. Shaft work is d...
An adult human being at rest produces roughly 0.40mJ/h of thermal energy through metabolic activity. Use that fact to solve the following problems. (a) A college student who weighs 128 pounds put off a major assignment until the day before it was due and worked for eight hours to comp...
Molten sodium chloride is to be used as a constant-temperature bath for a high-temperature chemical reactor. Two hundred kilograms of solid NaCl at 300K is charged into an insulated vessel, and a 3000kW electrical heater is turned on, raising the salt to its melting point of 1073K and...
Benzene vapor at 480°C is cooled and converted to a liquid at 25°C in a continuous condenser. The condensate is drained into 1.75-m3 drums, each of which takes 2.0 minutes to fill. Calculate the rate (kW) at which heat is transferred from the benzene in the condenser. ...
Your roommate has learned that burning approximately 3,500 food calories (Problem 7.3) results in a weight loss of 1 lbm, and he gets the bright idea of losing weight rapidly by eating ice. His theory is that the energy expended by the body in melting the ice and raising the resulting...

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