Chapter 6, Problem 6.112P

Two pounds mass of water in a piston-cylinder assembly, initially a saturated liquid at 45 lbf/in2, undergoes a constant pressure, internally reversible expansion to x2 = 90%.For this reversible process, determine the work by integrating p dV and the heat transfer by integrating T dS, each in Btu.

A gas with specific volume v₁ 1 m³/Kg and pressure p₁=6bar in a closed system undergoes a thermodynamic cycle which consists of the following three separate processes: 1->2: Isobaric compression to V₂=0.25 m³/Kg 2->3: Isometric heating. 3->1: Isothermal expansion (pV constant) to the initial volume. - Calculate the specific work produced by the gas per cycle. Present your answer in kJ/kg. =

Five kg of water is contained in a piston–cylinder assembly, initially at 5 bar and 300°C. The water is slowly heated at constant pressure to a final state. The heat transfer for the process is 3260 kJ and kinetic and potential energy effects are negligible.Determine the final volume, in m3, and the work for the process, in kJ.

A closed, rigid tank contains 2 kg of water initially at 80°C and a quality of 0.6. Heat transfer occurs until the tank contains only saturated vapor. Kinetic and potential energy effects are negligible. For the water as the system, determine the amount of energy transfer by heat, in kJ.

A divider separates 1 lb mass of carbon monoxide (CO) from a thermal reservoir at 150o F. the carbon monoxide, initially at 60o F  and 150 lbf/in2, expands isothermally to a final pressure of 10 lbf/in2 while receiving heat transfer through the divider from the reservoir. The carbon monoxide can be modeled as an ideal gas. (a) For the carbon monoxide as the system, evaluate the work and heat transfer, each in Btu and the amount of entropy produced, in Btu/oR. (b) Evaluate the entropy production, in Btu/oR, for an enlarged system that includesthe carbon monoxide and the divider, assuming the state of the divider remains unchanged. Compare with the entropy production of part (a) and comment on the difference.

Three pounds mass of water in a piston–cylinder assembly, initially a saturated liquid at 45 lbf/in2, undergoes a constant pressure, internally reversible expansion to x2 = 90%.For this reversible process, determine the work by integrating p dV and the heat transfer by integrating T dS, each in Btu.

A piston-cylinder assembly contains 0.6 lb of air initially at a pressure of 30 lbf/in² and a temperature of 300°F. The air is heated at constant pressure until its volume is doubled. Assume the ideal gas model with constant specific heat ratio, k = 1.4. Determine the work and heat transfer, in Btu.

Water contained in a Piston-cylinder assembly undergoes two processes in series from an initial state where the pressure is 10 bar and the temperature 400 C. Process 1-2: The water is cooled as it is compressed at a constant pressure of 10 bar to. the saturated vapor state. Process 2-3: The water is cooled at constant volume to 150 C. ( a ) sketch both processes on T-v and P-v diagrams. (b) For the overall process determine the work in kJ/kg. (c) For the overall process determine the heat transfer in k J/kg

Water, initially saturated vapor at 4.5 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.