Chapter 6, Problem 6.116P

Air is compressed in a piston-cylinder assembly from p₁ = 25 lb/in², T₁ = 500°R, V₁ = 9 ft³ to a final volume of V₂ = 1 ft³ in a process described by pv¹.25 = constant. Assume ideal gas behavior and neglect kinetic and potential energy effects. Using constant specific heats evaluated at T₁, determine the work and the heat transfer, in Btu. Step 1 * Your answer is incorrect. Determine the work, in Btu. W12= i -658.845 Btu

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.

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

2. Water is heated in a boiler tube at steady state from an inlet state of 500 kPa 25 deg-C (State-1) to an exit state of 500 kPa, 500 deg-C (State-4). Neglect changes in ke and pe, and use the PC model to answer these questions. If the mass flow rate of water is 5 kg/s Hide Details (a). Determine the rate of heat transfer in kW KW Enter answer as a decimal number (3.14, 5.0, -2.78, 5, for example) (b) What percent of the heat transfer is used to to boil the water from saturated liquid to saturated vapor state? Enter answer as a decimal number (3.14, 5.0, -2.78, 5, for example) (c) What percent of the heat transfer is used to heat up water to saturated liquid state? Enter answer as a decimal number (3.14, 5.0, -278, 5, for example)

please help with this question, from thermodynamics  A quantity of a certain perfect gas is compressed from an initial state of 0.084 m3, 1 bar to a final state of 0.034 m3, 3.7 bar. The specific heat at constant volume is 0.724 kJ/kg K, and the specific heat at constant pressure is 1.02 kJ/kg K. The observed temperature rise is 139 K. Calculate the increase of internal energy of the gas to two decimal places with the SI unit.

3.32 WP Water, initially saturated vapor at 4 bar, fills a closed, rigid container. The water is heated until its temperature is 400°C. For the water, determine the heat transfer, in kJ per kg of water. Kinetic and potential energy effects can be ignored.

1. A tank containing 250 kg of kerosene is to be heated from 20°C to 40 °C in 15 minutes, using 4 bar steam. The kerosene has a specific heat capacity of 2.0 kJ/kg-°C.over that temperature range. ha at 4.0 bar is 2,108.1 kJ/kg. The tank is well insulated and heat losses are negligible. Determine the rate of heat transfer required and steam flow.

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