Nitrogen (N2) gas within a piston-cylinder assembly undergoes a process from p1 = 25 bar, V1 = 0.8 m3 to a state where V2 = 3.5 m3. The relationship between pressure and volume during the process is pV1.5 = constant. For the N2, determine (a) the pressure at state 2, in bar, and (b) the work, in kJ. Will nitrogen gas be expanded or compressed at the end of the process?

A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.² and 400°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 60%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu. Part A Determine the work for the constant-pressure process, in Btu. W12-38.05 Your answer is correct. Hint Part B Your answer is correct. Determine the heat transfer for the constant-pressure process, in Btu. Q12--300.366 Part C Hint W23- Btu Determine the work for the constant volume process, in Btu. Save for Later Btu Btu Attempts: 2 of 4 used Attempts: 1 of 4 used Attempts: 0 of 4 used Submit Answer Part D The parts of this question must be completed in order. This part will be available when you complete the part above.

A piston-cylinder assembly contains 2 lb of water, initially at 100 lbf/in.² and 400°F. The water undergoes two processes in series: a constant-pressure process followed by a constant volume process. At the end of the constant-volume process, the temperature is 300°F and the water is a two-phase liquid-vapor mixture with a quality of 60%. Neglect kinetic and potential energy effects. Determine the work and heat transfer for each process, all in Btu. Part A * Your answer is incorrect. Determine the work for the constant-pressure process, in Btu. W12= 38.65 Btu

A fixed mass of gas undergoes changes of pressure and volume as shown below. V When the gas is taken from state P to state R by stages PQ and QR, 8 kJ of heat are absorbed by it and 3 kJ of work are done by it. When the same resultant change is achieved by stages PS and SR, 1 kJ of work is done by the gas. In this case which of the following represents the heat transfer? Select one: 8 kJ of heat are absorbed b. 4 kJ of heat are rejected 12 kJ of heat are rejected O d. 10 kJ of heat are absorbed

In a given experiment, we want to study the expansion of a gas from state i to state f by three different paths in the pV diagram. Based on the following figure, where the pressure is indicated in atmospheres and the volume in liters, determine the work done by the gas, in joules: (a) Along the path iaf (b) Along the path if. (c) Along path ibf.

Air expands adiabatically in a piston-cylinder assembly from an initial state where p₁ = 100 lbf/in.², v₁ = 3.704 ft³/lb, and T₁ = 1000 °R, to a final state where p₂ = 30 lbf/in.²2 The process is polytropic with n = 1.4. The change in specific internal energy, in Btu/lb, can be expressed in terms of temperature change as Au = (0.171)(T₂ - T₁). Determine the final temperature, in °R. Kinetic and potential energy effects can be neglected. T₂ = i °R

Five lbs of propane is contained in a closed, rigid tank initially at 80 lbf/in.2, 50°F. Heat transfer occurs until the final temperature in the tank is 0°F. Kinetic and potential energy effects are negligible. Determine the amount of energy transfer by heat, in Btu. Q= i Btu

A gas in a piston-cylinder assembly undergoes a process during which its volume reduces from 2 m to 1 m°. During this process, the system specific volume does not change O increases twice O reduces twice