Chapter 7, Problem 7.69P

Air contained in a rigid, insulated tank fitted with a paddle wheel, initially at 4 bar, 40 °C, and a volume of 0.2 m, is stirred until its temperature is 353 °C. Assuming the ideal gas model with k = 1.4 for the air, determine (a) the final pressure, in bar (b) the work, in kJ (c) the amount of entropy produced, in kJ/K. Ignore kinetic and potential energy.

Thermodynamics, please show all work. Step 1 and 2.

Twenty m3/hr of air at 600 kPa, 330 K enters a well-insulated, horizontal pipe having a diameter of 1.2 cm and exits at 120 kPa. Assume steady state and use the ideal gas model for the air. Also assume constant specific heat, c, = 1.007 kJ/kg-K for air at 330 K. Determine the mass flow rate, in kg/s, and the exit velocity, in m/s. Step 1 Determine the mass flow rate, in kg/s. i kg/s Save for Later Attempts: 0 of 1 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.

Water at 10 bar, 240°C enters a turbine operating at steady state and exits at 4 bar. Stray heat transfer and kinetic and potential energy effects are negligible. A hard-to-read data sheet indicates that the quality at the turbine exit is 49%. Determine the entropy production in Joules/kg. K.

11. thermodynamics

Twenty m³/hr of air at 600 kPa, 330 K enters a well-insulated, horizontal pipe having a diameter of 1.2 cm and exits at 120 kPa. Assume steady state and use the ideal gas model for the air. Also assume constant specific heat, cp = 1.007 kJ/kg-K for air at 330 K. Determine the mass flow rate, in kg/s, and the exit velocity, in m/s. Step 1 Your Answer Determine the mass flow rate, in kg/s. mi = Step 2 Correct Answer (Used) 0.0352 * Your answer is incorrect. kg/s Determine the exit velocity, in m/s.

Step by step solution please I only have 1 attempt thank you.

Step by step solution please thank you.

Carbon dioxide (CO2) at 1 bar, 300 K enters a compressor operating at steady state and is compressed adiabatically to an exit state of 10 bar, 550 K. The CO2 is modeled as an ideal gas, and kinetic and potential energy effects are negligible. For the compressor, determine: (a) the work input, in kJ per kg of CO2 flowing, (b) the rate of entropy production, in kJ/K per kg of CO2 flowing, and (c) the percent isentropic compressor efficiency. Part A Determine the work input, in kJ per kg of CO2 flowing. W. cy kJ/kg Save for Later Attempts: 0 of 1 used Submit Answer Part B The parts of this question must be completed in order. This part will be available when you complete the part above. Part C The parts of this question must be completed in order. This part will be available when you complete the part above.