Engineering, 09.12.2021 16:30 dozsyerra
The Redlich-Kwong equation of state is given by RT a v - b v(v + b)/T where R = the universal gas constant = 0.518 kJ/(kg K)J. T = absolute temperature (K). p= absolute pressure (kPa), and v = the volume of a kg of gas (m/kg). The parameters a and b are calculated by R T2.5 a = 0.427 Pe b = 0.0866 R- Pe where pe = critical pressure (kPa) and T = critical temperature (K). As a chemical engineer, you are asked to determine the amount of methane fuel (P. = 4600 kPa and T, = 191 K) that can be held in a 3-m' tank at a temperature of –40 C with a pressure of 65,000 kPa. Use a root-locating method of your choice to calculate v and then determine the mass of methane contained in the tank.
Answers: 3
Engineering, 05.07.2019 23:20
Which one of the following faults cause the coffee in a brewer to keep boiling after the brewing cycle is finished? a. an open circuit in the heating element b. a short circuit at the terminals c. welded contacts on the thermostat d. a leak around the gasket
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Engineering, 06.07.2019 03:10
Consider a 1.2 meter high and 2 meter wide glass window whose thickness is 6 mm and thermal conductivity is 0.78 w/m °c. the room temperature is maintained at 24 °c, while the outdoor temperature is -5 °c. the convective heat transfer coefficients on the inner and outer surfaces of the window are 10 w/m2 °c and 25 w/m2 °c respectively. (a) draw the thermal resistance network, etermine the steady rate of heat transfer t e glass window (c) determine the temperature of the inner surface of the window
Answers: 3
Engineering, 06.07.2019 03:10
Asolid steel sphere (k=63.9 w m-1 k-1 , ? =7832 kg m-3 , c=0.523 kj kg-1 k-1 ), 100 mm in diameter is initially at a uniform temperature of 500o c and is suddenly quenched in a large oil bath for which t? = 100o c and h = 3200 w m-2 k-1. estimate the time required for the sphere to cool to 200o c and to 110o c
Answers: 1
Engineering, 06.07.2019 03:20
An air-conditioning system consists of a heating section and an evaporative cooler. air enters the heating section at 10°c and 70 percent relative humidity at a rate of 30m^3/min, and it leaves the evaporative cooler at 20°c and 60 percent relatively humidity. if the air conditioning system operates at a total pressure of 98 kpa, determine (a) the temperature and relative humidity of the air when it leaves the heating section, (b) the rate of heat transfer in the heating section, and (c) the rate of water added to air in the evaporative cooler
Answers: 2
The Redlich-Kwong equation of state is given by RT a v - b v(v + b)/T where R = the universal gas co...
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