internal energy of the gas during the process.
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- A 2.5 lbm of a gas and receives heat at constant pressure of 55 psia. The internal energy increases by 240 BTU and temperature increases by 120°F. 120 BTU of work is done by the gas, determine, the constant pressure specific heat. Answer: 1.5A windmill is attached to an electric generator that produces an average electric power of 5 kW. The poweris used to charge a storage battery for 8 hours. If the amount of energy stored in battery is 1.27x105 kJ, determine the heat transfer from the battery to the surroundings in kW. Need full solutions and answer.A 70-lbm copper block initially at 220°F is dropped into an insulated tank that contains 1.2 ft3 of water at 65°F. Determine the work potential wasted during this process. Assume the surroundings to be at 65°F.
- q0.5 liters of liquid water at 15°C is contained in a piston-cylinder with stops as shown. The piston has a mass of 320 kg and a diameter of 10cm. Stops in the cylinder are at 60cm The system is heated until the water reaches 300°C a.Find the thermal energy in kJ that is needed for this process. [1495kJ]A fluid enters a machine at 170m/s, 800kPa, and with a specific volume of 0.3 m³/kg. The radiation heat loss is 25 kJ/kg. The internal energy decreases 485 kJ/kg. If the fluid leaves at 330 m/s, 138 kapa , and 0.95 m³/kg, determine the work done by the fluid in kJ/kg. Complete solution .A fluid enters a machine at 170 m/s, 800 kPa, and with a specific volume of 0.3 m3/kg. The radiation heat loss is 25 kJ/kg. The internal energy decreases 485 kJ/kg. If the fluid leaves at 330 m/s, 138 kPa, and 0.95 m3/kg, determine the work done by the fluid in kJ/kg. Please answer with complete solution thank you.
- A frictionless piston-cylinder device contains a gas initially at 0.8 MPa and 0.015 m³. It expands quasi-statically at constant temperature to a final volume of 0.030 m³. What is the work output during this process?A gas contained in a vertical cylindrical tank has a volume of [10 + (162/100)] m3. The gas receives a paddle work of 7.5 W for 1 hours. If the density of the gas at the initial state is 1.5 kg/m3, determine the specific heat gain or loss if the specific internal energy of the gas increases by [(K/10) + 5] kJ/kg .As the insulation around an adiabatic and frictionless piston-cylinder system is removed, 42500 J heat is lost to the surrounding. As a result, the gas in the cylinder contracts and hence 400 dm3 volume of the gas in the cylinder becomes half. Having that the atmospheric pressure is 100 kPa and the weight on the piston exerts additional 5 kPa, determine the change in the internal energy of the gas during this process.
- Consider an automobile traveling at a constant speed along a road. Determine the direction of the heat and work interactions, taking the following as the system: (a) the car radiator, (b) the car engine, (c) the car wheels, (d) the road, and (e) the air surrounding the caA fluid at 700 kPa, with a specific volume of 0.25 m3/kg and a velocity of 175 m/s, enters a device. Heat loss from the device by radiation is 23 kJ /kg. The work done by the fluid is 465 kJ /kg. The fluid exists at 136 kPa, 0.94 m3/kg, and 335 m/s. Determine the change in internal energy.A cylinder with a moveable piston holds 0.17 lbm of hydrogen initially with a volume of 1.35 ft³ at a temperature of 1,336°F. Then, the volume is expanded to 2.73 ft³ while the gas pressure remains constant. Determine the work in BTU.