Air undergoes an isobaric process from T1 = 300 degrees Celsius  to T2 = 250 degrees Celsius as an ideal gas in a closed system.  The air volume reduces in the process. True or False.

A piston-cylinder assembly contains a mystery substance that undergoes a series of processes. Process 1-->2: Constant pressure process at 5bar from v1=.07m3/kg to v2=.12m3/kg Process 2->3: Constant volume process to saturated vapor Process 3->4: Constant temperature process to quality of 50% Process 4->5: Constant volume process to 5bar Sketch the processes on Pt, Pv, and Tv, plots. Lable the axes including property values; use closed dots to show the states, use solid lines to connect the states, add number and arrows to make clear the states numbers and process directions. Could this be considered a thermodynamic cycle? Why or why not?

Need help with this engineering problem. Which unit could be used in the Ideal Gas law equation to get specific volume in ft3/lbm? absolute pressure in lbf/ft2, Temperature in °R and the gas constant in ft·lbf/lbm·°R absolute pressure in lbf/ft2, Temperature in °F and the gas constant in ft·lbf/lbm·°R absolute pressure in lbf/ft2, Temperature in °R and the gas constant in ft·lbm/lbf·°R barometric pressure in lbf/ft2, Temperature in °R and the gas constant in ft·lbf/lbm·°R gauge pressure in lbf/ft2, Temperature in °F and the gas constant in ft·lbf/lbm·°R

QUESTION 2 Consider a quantity of 2.0 kg of refrigerant R-134a. The refrigerant fills a 9.9 ft weighted piston/cylinder apparatus that is at a constant pressure of 29 psi. The system is then heated until it reaches a temperature of 86 °F. a.) What is the initial temperature of the refrigerant? b.) What is the final volume of the refrigerant? Note: Refer to property tables in appendix 1 of textbook Attach File Browse Local Files