Chapter 6, Problem 6.28CU

If a system is at steady state, does this mean intensive properties are uniform with position throughout the system or constant with time? Both uniform with position and constant with time? Explain.

A gas contained within a piston-cylinder assembly undergoes three processes in series: Process 1-2: Constant volume from p₁ = 1 bar, V₁ = 4 m³ to state 2, where p2 = 2 bar. Process 2-3: Compression to V3 = 2 m³, during which the pressure-volume relationship is pV = constant. Process 3-4: Constant pressure to state 4, where V4 = 1 m³. Sketch the processes in series p-V coordinates and evaluate the work for each process, in kJ. Hint: Draw all the processes neatly on P-V diagram. Denote the states 1-4. Do not forget to add arrows.

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thermodynamics  Describe the operation of thermodynamics systems and their properties and explain the application of the first law of thermodynamics to appropriate systems given in the figure 1.2. At the end explain the relationships between system constants R, Cv, and Cp for a perfect gas where a perfect gas has a molar mass of 26kg/k mole and value of gamma is 1.26.

Question 1 (a) Determine if the systems with the known properties below are completely specified in terms of their states based on state postulate? Explain if the state of any system cannot be specified. (i) System 1: Density and specific volume (ii) System 2: Mass and temperature (iii) System 3: Pressure and specific enthalpy (iv) System 4: Total volume and specific internal energy (v) System 5: Temperature, total enthalpy, and mass (b) In piston cylinder device with valve assembly, the system that is defined by the dashed line boundary consists of air in the cylinder as shown in Figure 1. Both valves are closed and there is no leakage through the sidewall of the piston during the compression. Determine whether the following statements are true or false. Piston Figure 1 Valve Statement 1: All parts of the system boundary shown in Figure I are moving boundary. Statement 2: The compression process is quasi-equilibrium if the compression happens in a very fast manner. Statement 3: If…

3.  In the rotational frame, work done between two instances of rotational states is nothing but the difference in rotational kinetic energy between those states        True        False

3.2. Heat and Work 0.2 kg of argon (mon-atomic ideal gas, R = 0.208 kJ/kgK ), initially at 250K, are confined in an isochoric system of 0.15 m^3 volume, and 2.5 kg of xenon (mon-atomic ideal gas, R = 0.063 kJ/kgK ), initially at 420K, are confined in an isobaric piston-cylinder system at 1.8 bar. Both systems are brought into thermal contact and equilibrate their temperatures with no heat loss to the outside.   What is the final temperatures, pressures and volumes of both gases, the work done by both systems, and the amount of heat transferred between the two systems and the total generation of entropy? (Sgen= ∫ Sgen dt ) and s=Cv =3/2R, Cp =5/2R

4) Figure shows a gas contained in a vertical piston-cylinder assembly. The total mass of the piston (including shaft) is 100 kg. While the gas is slowly heated, the internal energy of the gas increases by 0.1 kJ, the potential energy of the piston-shaft combination increases by 0.2 kJ. The piston and cylinder are poor conductors, and friction between them is negligible. The local atmospheric pressure is 1 bar and approximate g as 10 m/s². The cross-sectional area of the piston is 0.01 m². Determine, (a) the work done by the gas, (b) the heat transfer to the gas, all in kJ. Patm = 1 bar Gas 0.01 m²

Drag and Drop the correct answers in the blanks. A mass mis hanging from the end of a vertical spring that has a spring constant k. The equilibrium position of the mass, yo, is The total potential energy of the mass when it is displaced by s from the equilibrium position is given by Y. is zero + U(s) = ks + positive * negative 1 1 ks+ 21 + U(s) ks² + mgyo %3D U(s) mgyo