Use image below Part A - Evaluate the volume and internal energy of the air in the initial state 1, in the intermediate state 2, and in the final dead state DS. Also evaluate the temperature of the air in the intermediate state 2. PArt B - Plot the processes 1 → 2 → DS on P–v, T–v, P–s, and T–s diagrams. Mark states 1, 2, and DS on the graphs, and make sure that it is clear when a given quantity increases, decreases, or remains constant.

An amount of an ideal gas undergoes the process shown in the diagram below. Assume that during the entire cycle, the number of moles of the ideal gas stays constant. Р. A В V (a) What are the signs of Way the gast Q, and AEint for the process CA? positive positive Wby the gas AEint zero (b) What are the signs of Wby the gas Q, and AEint for the process AB? negative negative zero W by the gas AEint (c) What are the signs of Wby the gas: Q, and AEint for the process BC? Wby the gas positive Q negative DE int zero

2. An ideal gas (the weight is m kg) in an idealized piston-cylinder assembly undergoes a series of processes from state 1 to states 2, 3 and 4. Each state is at equilibrium. The gas can be modeled as a closed system. Ignore changes of KE and PE. The states are fixed by the following properties in the table: State 1 2 3 4 8 7 9 Note: State 1 to 2 is a constant-temperature process. State 2-3 is a constant-volume process. State 3-4 is a constant-temperature process. (a) Mark the states 1-4 and draw the three processes (1-2, 2-3, 3-4) on the following p-v diagram. p (bar) 4 5 3 1 2 0 p (bar) 1 3 1 6 3 v (m³/kg) 3 1 1 2 2 300K 600K T (K) 300 300 600 600 3 4 5 v (m³/kg) 6 7 8 (b) Use equations and simple texts to explain and answer the questions for the two processes (process 1-2, and process 2-3), respectively. (i) How does the internal energy change during each process: no change, increase or decrease (AU)? (ii) How does the enthalpy change during each process (AH)? (iii) Is the work…

Show P - V or T - V diagram and indicate corresponding state.