Liquid ethanol (C2H5OH) at 25°C, 1 atm enters an insulated reactor operating at steady state and burns completely with air entering at 370 K, 1 atm. The combustion products exit at 1000 K. Kinetic and potential energy effects can be neglected and the air can be modeled as 21% O2 and 79% N2 on a molar basis. Determine the percent excess air used.

4

You are working for a factory that uses benzene in it process. The effluent flow out of the process is air at a temperature of 138˚C and atmospheric pressure that contains 20,000 ppm of benzene. The flow rate is 0.5 m3/s. If you want to recover 33% of this benzene by condensing it, what temperature should you cool it to?

H1.

ll Verizon 99% 1:01 AM Done 3. A vessel containing 50 liters of saturated steam at 150 °C is cooled down to 25 °C. Using data from steam tables, determine the final mass and volume of the liquid water in the vessel. Calculate how much heat needs to be removed

A7.

A refrigerator has an ice tray compartment at -18.0°C and the room temperature is 20.2°C. The refrigerator can convert 37.7 g of water at room temperature to that many grams of ice at -18.0°C every minute. If the specific heat of ice is 2.09 kJ/kg.K, the specific heat of water is 4.186 kJ/kg.K, the latent heat of fusion is 333.2 kJ/kg and the power required is 82.5 W, what is the COP (cooling) of the refrigerator?

The following gas-phase reaction takes place in a closed, constant-volume batch reactor at isothermal (constant temperature) conditions. 2CO+O2→2CO2 Initially, the reactor contains 0.564 kmol of CO, 1 kmol of O2, 1 kmol of CO2, and 0.5 kmol of N2 at a total pressure of 5 atm. At time t, the reactor pressure is 4.5 atm. Assuming ideal gas behavior, what is the extent of reaction (in kmol) at time t?

An open boiler system uses the combustion of kerosene in the air to produce the needed heat. Kerosene can be approximated as C12H26. The reactants and products are at a pressure of 1atm. The temperature of the fuel and air entering the combustion chamber is 298K and the temperature of the products is 400K. The fuel is burned at stoichiometric conditions. Calculate the heat released per kmole of fuel for the combustion of kerosene in this system with the given inlet and outlet conditions for complete combustion (only H2O, CO2, and N2 in products).

An isothermal continuous flow reactor is needed to carry out the decomposition of ethanal toproduce methane and carbon monoxide. The process takes place in the presence of nitrogen at595 K and 1.5 bar as shown below:CH3CHO → CH4 + CO The reactor used is a plug flow reactor. 1) Detailed sketch of the reactor. 2) Mechanical design