For a system to be in thermodynamic equilibrium, do the temperature and the pressure have to be the same everywhere? Explain.
Consider a nuclear power plant that produces 1000 MW of power and has a conversion efficiency fo 30% (that is, for each unit of fuel energy used, the plant produces 0.3 unit of electrical energy). Assuming continuous operation, determine the amount of nuclear fuel consumed by this plant per year. Please show steps and explain. T ...continues
A gas is contained in a vertical, frictionless piston cylinder device. The piston has a mass of 4 kg and cross-sectional area of 35 cm^2. A compressed spring above the piston exerts a force of 60 N on the piston (as seen in Figure P1-73 attached). If the atmospheric pressure is 95 kPa. determine the pressure inside the cylinder. ...continues
Superheated water vapour at 180 psia and 500 degrees Farenheit is allowed to cool at a constant volume until the temperature drops to 250 degrees Farenheit. At the final state, determine: (a) the pressure (b) the quality (c) the enthalpy. Also, show the process on a T-v diagram with respect to saturation lines. Please sho ...continues
Water is to be boiled at sea level in a 30-cm-diameter stainless steel pan placed on top of a 3-kW electric burner. If 60% of the heat generated by the burner is transferred to the water during boiling, determine the rate of evaporation of water. See Figure 2-39 attached. Please show steps.Thanks.
A tank whose volume is unknown is divided into two parts by a partition. One side of the tank contains 0.01 m^3 of refrigerant-134a that is a saturated liquid at 0.8 MPa, while the other side is evacuated. The partition is now removed, and the refrigerant fills the entire tank. If the final state of the refrigerant is 25 degree ...continues
I missed class, and was unable to obtain the material. I have no clue on these practice excersizes. I dont know how to start , setup or solve these problems. I NEED SOMEONE TO THOROUGHLY EXPLAIN STEPS AND PROCEDURES ON SOLVING THESE EXCERSIZES AS MUCH AS POSSIBLE !!!!!!!! I think some of these excersices you will setup stoic ...continues
Steam is leaving a pressure cooker whose operating pressure is 30 psia. It is observed that the amount of liquid in the cooker has decreased by 0.4 gal in 45 minutes after the steady operating conditions are established, and the cross-sectional area of the exit opening is 0.15 in^2. Determine (a) the mass flow rate of the steam ...continues
A piston-cylinder device contains 5 kg of refrigerant-134a at 800 kPa and 60 degrees Celsius. The refrigerant is now cooled at constant pressure until it exists as liquid at 20 degrees Celsius. Determine the amount of heat loss and show the process on a T-v diagram with respect to saturation lines. Please show steps. Ans ...continues
A 10-ft^3 tank contains oxygen initially at 14.7 psia and 80 degrees F. A paddle wheel within the tank is rotated until the pressure inside rises to 20 psia. During the process 20 Btu of heat is lost to the surroundings. Determine the paddle-wheel work done. Neglect the energy stored in the paddle wheel.
