Chapter 7, Problem 7.23P

Carbon dioxide (CO₂) fills a closed, rigid tank fitted with a paddle wheel, initially at 80°F, 50 lb/in², and a volume of 1.6 ft³. The gas is stirred until its temperature is 500°F. During this process heat transfer from the gas to its surroundings occurs in an amount 2.6 Btu. Assume ideal gas behavior, but do not assume constant specific heats. Kinetic and potential energy effects can be ignored. Determine the mass of the carbon dioxide, in lb, and the work, in Btu.

Carbon dioxide (CO₂) fills a closed, rigid tank fitted with a paddle wheel, initially at 80°F, 50 lb/in², and a volume of 1.6 ft³. The gas is stirred until its temperature is 500°F. During this process heat transfer from the gas to its surroundings occurs in an amount 2.6 Btu. Assume ideal gas behavior, but do not assume constant specific heats. Kinetic and potential energy effects can be ignored. Determine the mass of the carbon dioxide, in lb, and the work, in Btu. Step 1 Determine the mass of the carbon dioxide, in lb. m = 0.60792 Hint Your answer is correct. Step 2 * Your answer is incorrect. Determine the work, in Btu. W12= -53.4318 eTextbook and Media Hint lb Btu Attempts: 1 of 4 used Assistance Used

Carbon dioxide (CO₂) fills a closed, rigid tank fitted with a paddle wheel, initially at 80°F, 20 lb/in², and a volume of 1.8 ft³. The gas is stirred until its temperature is 500°F. During this process heat transfer from the gas to its surroundings occurs in an amount 2.6 Btu. Assume ideal gas behavior, but do not assume constant specific heats. Kinetic and potential energy effects can be ignored. Determine the mass of the carbon dioxide, in lb, and the work, in Btu. Step 1 Determine the mass of the carbon dioxide, in lb. m = i Save for Later lb Attempts: 0 of 4 used Submit Answer Step 2 The parts of this question must be completed in order. This part will be available when you complete the part above.

Need help going through the process of solving this problem to see where I'm going right, and where I'm going wrong One kg of carbon dioxide (CO2), in a piston-cylinder assembly, initially at 90°F, 30 lbf/in^2, is compressed isothermally to a final pressure of 110 lbf/in^2. During compression, the nitrogen rejects energy by heat transfer through the cylinder’s end wall, which has inner and outer temperatures of 90°F and 80°F, respectively. Let T0 = 80°F, and P0 = 15.5 lbf/in^2. Using the ideal gas model for the carbon dioxide. Consider carbon dioxide as the system: a. Determine the amount of work required for the compression, in Btu. b. Determine the exergy transfer accompanying the work, in Btu. c. Determine the exergy transfer accompanying the heat transfer, in Btu. d. Determine the exergy destroyed during the process, in Btu.

Referring to the figure shown below, water contained in a piston–cylinder assembly, initially at 1.5 bar and a quality of 20%, is heated at constant pressure until the piston hits the stops. Heating then continues until the water is saturated vapor. The initial height, L1, is 0.05 m and the change in height, L2, is 0.02 m.   For the overall process of the water, evaluate the work and heat transfer, each in kJ/kg.Kinetic and potential effects are negligible.

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Two kg of oxygen

A rigid tank whose volume is 4 mở, initially containing air at 1 bar, 295 K, is connected by a valve to a large vessel holding air at 6 bar, 295 K. The valve is opened only as long as required to fill the tank with air to a pressure of 6 bar and a temperature of 350 K. Assuming the ideal gas model for the air, determine the heat transfer between the tank contents and the surroundings, in kJ. Qev i 339.86 kJ

Refrigerant 134a enters an insulated compressor operating at steady state as saturated vapor at -12oC with a volumetric flow rate of 0.18 m3/s. Refrigerant exits at 8 bar, 70oC. Changes in kinetic and potential energy from inlet to exit can be ignored.Determine the volumetric flow rate at the exit, in m3/s, and the compressor power, in kW. The volume metric flow rate of .05262 m^3/s is correct.  My power input is incorrect.  See attached