FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119803645
Author: Sonntag
Publisher: WILEY
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Chapter 5, Problem 5.39P
R−134a fills a
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Ammonia (an ideal gas) is contained in a 1.5 cubic meter piston. Initially, it is 200 kPa, 20C but it is compressed to 40C (at constant pressure). During this process, 1500 kJ of heat is rejected to the 20C surrounding and 750 kJ of work is done. Is this process possible?
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A constant-pressure piston/cylinder assembly contains 0.2 kg of water as saturated vapor at 300 kPa. It is now cooled so that the water occupies one third of the original volume. Find
1- the work done in the process in kJ.
2- the heat transfer done in the process in kJ
Chapter 5 Solutions
FUNDAMENTALS OF THERMODYNAMICS
Ch. 5 - Prob. 5.1PCh. 5 - A windowmounted air conditioner removes 3.5kJ from...Ch. 5 - R410A enters the evaporator (the cold beat...Ch. 5 - A large heat pump should upgrade 4MW of heat at...Ch. 5 - A car engine 5g/s fuel (equivalent to addition of...Ch. 5 - Prob. 5.37PCh. 5 - R134a fills a 0.1m3 capsule at 20°C, 200kPa. It is...Ch. 5 - Air in a piston/ cylinder goes through a Carnot...Ch. 5 - A heat engine receives 7kW from a 300°C source and...Ch. 5 - Consider the previous problem and assume the...
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- A container maintains a constant pressure of 86300 Pa and volume of 116 liters while 49960 J of heat is added. How much work is done by the gas? *arrow_forwardA piston-cylinder device contains 2.25 kg of liquid water at 20oC and 300 kPa, at this state, a linear spring is touching the piston but exerts no force on it. Heat is now slowly transferred to the cylinder, causing the pressure and the volume to rise to 2.25 MPa and 0.1125 m3, respectively. 1) What is the final temperature (oC)? 2) What is the work on the process (kJ)?arrow_forwardAn inactive system comprising of 3 kg of the fluid in an adiabatic process according to pv1.3 = constant. The initial conditions are 1 Mpa and 150o C, and the final pressure is 0.2 Mpa. Find Work done and U for the process and compare Why is the work transfer in this process not equal to ʃ pdV?arrow_forward
- Find the work needed to compress 2 kg of air in an insulated cylinder from 100 to 600 kPa if T1 = 20 C.arrow_forwardNeed help solving this problem. Please provide clear and concise steps in neat handwriting.arrow_forwardA piston-cylinder device initially contains 0.8m3 of saturated water vapor at 250 kPa. At this state, the piston is resting on a set of stops, and the mass of the piston is such that a pressure of 300 kPa is required to move it. Heat is now slowly transferred to the steam until the volume doubles. a. Indicate knowns and unknows for each state as well as what type ofprocess is performed to get from one state to another. State anyassumptionsb. Determine the final temperaturec. Determine the work done during the processd. Show the process on a P-v diagram with respect to saturation linese. Determine the total heat transferred during this processarrow_forward
- Two kilograms of ice at -24C is heated in an open pan until melts and then evaporates. The saturate vapor exits the system at 100C. How much heat must be added to the system for this to occur?arrow_forwardSolve the problemarrow_forwardHi, pls help me solve this problem. Thank you so much.arrow_forward
- A 400 lbm object accelerates from 10.0 ft/s to 17.5 ft/s. How much work has been done?arrow_forwardQ2: Air in A frictionless piston-cylinder device is compressed slowly according to the relation PV16- constant until it reaches a final temperature of 410 K. if you Know the piston-cylinder device initial condition contains 6 kg of air at 130 kPa and 300 K. Calculate the work input during this process.arrow_forwardA rigid closed tank contains refrigerant 134a wnich is initially with a temperaf lure of D'C and a quality Of Ce0% . An electrical resistor inistalled inside the Fank transfers heat energy to the refrigerant at a rate Of 2 kW until the tånk contains only saturated vapor. if the tank is well - insulated and the mass Of the refrigerant is 1.5 kg, determine the time it takes for the process to be completed in seconds using 5 signifigant figures. a two- phase liquid - vapor muturearrow_forward
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