3. The closed piston-cylinder assembly shown contains Ammonia. The piston moves between two sets of stops. When the piston is against the left stop, the enclosed volume is V₁ 1.0 m³ and when the piston is against the right stop the enclosed volume is VR = 2.5 m³. Atmospheric pressure is 1 bar. Heat is added so that the piston moves slowly to the right. Sketch all processes on a p - v diagram and determine the net work done during each process. M O . State 1: The piston is in contact with the left stop and P₁ = 0.8 bar State 2: The piston first leaves the left stop State 3: The piston first reaches the right stop State 4: The pressure in the piston increases to P₂ = 5 bar 0 Ammonia 0

Consider the series of processes shown in the p-V diagram below for a piston-cylinder system. Given the diagram information, determine the net work for the process from State 1 to State 3, in units of [kJ]. Specify whether the net work is into or out of the system, per our convention.

* Your answer is incorrect. A piston-cylinder assembly contains 0.7 lb of propane. The propane expands from an initial state where p₁ = 60 lbf/in.² and T₁ = 70°F to a final state where p₂ = 10 lbf/in.² During the process, the pressure and specific volume are related by pv² = constant. Determine the energy transfer by work, in Btu. W = i 3.123 Btu

be sure to follow sign convention.

just part d answer options are 1.8kJ 1.3J 1.3kJ 1.8J

Oxygen (molar mass 32 kg/kmol ) expands reversibly in a cylinder behind a piston at a constant pressure of 3.102 bar. The volume initially is 0.0119 m and finally is 0.0327 m; the initial temperature is 18.24 °C. Calculate the heat supplied during the expansion in the correct unit to two decimal places. Assume oxygen to be a perfect gas and take the specific heat at constant pressure as = 0.917 kJ/kg Kand molar gas constant as = 8,314 J/ kmol K