Chapter 6, Problem 6.31P

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.

Evaluate the work and heat transfer, each in kJ per kg refrigerant

QUESTION 19 The mass of CO2 is 0.066 kg in a system (with molar mass 44 kg/kmol), occupying a volume of 0.026 m³ at 0.9 bar is compressed reversibly until the pressure is 5.33 bar. If the molar (universal) gas constant as 8.3145 kJ/kmol K, calculate the final temperature (in C) when the process is isothermal. Answer to 3 d.p. No need for unit

One-quarter lbmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in2, T1 = 500oR to p2 = 150 lbf/in2. For the process W = -500 Btu and Q = -202.5 Btu. Assume the oxygen behaves as an ideal gas.  Determine T2, in oR, and the change in entropy, in Btu/oR.

A rigid, well-insulated tank contains air. A partition in the tank separates 12 ft^3 of air at 14.7 lbf/in2, 40◦F (left side of the tank) from 10 ft^3 of air at 50 lbf/in2, 200◦F(right side of the tank), as illustrated in the figure. The partition is removed and air from the two sides mix until a final equilibrium state is attained. The air can be modeled as an ideal gas, and kinetic and potential energy effects can be neglected. (Note: values for the left side of the tank are denoted with a subscript L, and values for the right side of the tank are denoted with a subscript R). a) Determine the final temperature (in F) b) Determine the final pressure (in lbf/in^2) c) Calculate the amount of entropy produced, in Btu/R d) Is this mixing process reversible or irreversible?

Thermodynamics, please help and show all work please.

Air contained in a rigid, insulated tank fitted with a paddle wheel, initially at 300 K, 2 bar, and a volume of 2 m³, is stirred until its temperature is 600 K. Assuming the ideal gas model for the air, and ignoring kinetic and potential energy, determine: (a) the final pressure, in bar. (b) the work, in kJ. (c) the amount of entropy produced, in kJ/K. Solve using: (1) data from Table A-22. (2) constant c, read from Table A-20 at 400 K.

One-quarter lbmol of oxygen gas (O2) undergoes a process from p1 = 20 lbf/in2, T1 = 500oR to p2 = 150 lbf/in2. For the process W = -500 Btu and Q = -240.0 Btu. Assume the oxygen behaves as an ideal gas. Determine T2, in oR, and the change in entropy, in Btu/oR.

8. There are 2.30 kg/min. of steam undergoing an isothermal process from 25.5 bar, 317 C to 6.3 bar. Determine (a) AS (b) W for nonflow, and (d) W for steady flow with P = 0, K =42kJ/min. (1 bar = 100 kPa) %3D