Chapter 8, Problem 8.23P

Kajal

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THERMODYNAMICS A certain gas expand from 7ft3 to 23ft3 while the pressure remains constant at 17.5psia. Find the work nonflow in the system in BTU.

A piston cylinder contains 22kg of air at 20 degC and 300 kPa. It is now heated up in a constant pressure process to 600 K. Find the final volume.

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Find the mass of water that can be cooled from 26°C to-10°C from a 20 tons refrigeration system for 14 hrs.

Two rigid tanks are filled with water. Tank A is 0.2 m³ at 100 kPa, 150°C and tank B is 0.3 m³ at saturated vapor 300 kPa. The tanks are connected by a pipe with a closed valve. We open the valve and let all the water come to a single uniform state while we transfer enough heat to have a final pressure of 300 kPa. Give the two property values that determine the final state and find the heat transfer. B A

Water at 2.5 MPa and 200 degree celcius is heated at constant temperature up to 80% quality. Find the quantity of heat received by the water in kJ/kg and the work in nonflow process in Kj/Kg.

Refrigerant R134a in piston cylinder assembly, 200 kPa in initial state pressure and in the form of saturated vapor. It is then reversed and The final pressure is 1000 kPa by being compressed in the adiabatic state change. a) Find the final temperature (°C). b) Find the work done (kj/kg). Note: The changes in kinetic and potential energies will be neglected.