EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
9th Edition
ISBN: 9781119321453
Author: Sonntag
Publisher: JOHN WILEY+SONS,INC.-CONSIGNMENT
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Chapter 5, Problem 5.48P
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?
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? *
A 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)?
Chapter 5 Solutions
EBK FUNDAMENTALS OF THERMODYNAMICS, ENH
Ch. 5 - Prob. 5.1PCh. 5 - A windowmounted air conditioner removes 3.5kJ from...Ch. 5 - Prob. 5.18PCh. 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. 5.45PCh. 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 - Consider the previous problem and assume the...
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- An 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_forward3. In a hot water heating system, water heated to 95°C and then is pumped at the rate of 4 L/min through a radiator where it is cooled to 35°C. If the water arives at the radiator at a temperature of 85°C, how much heat in kJ does the radiator release each hour?arrow_forwardIn a insulated rigid container there is helium gas being stirred by a paddle wheel using 0.02 hp for 30 minutes. Initially, the gas is 80 farheinheit and 50 psia. Constant Specific heat of .753 Btu/lbm-F. What is the final temperature and the final pressure.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_forwardThe tank of a leaky air compressor originally holds 90 L of air at 33deg C and 225 kPa. During a compression process, 4 grams of air is lost; the remaining air occupies 42 L at 550 kPa. What is the temperature of the remaining in air in degree centigrade.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
- 1 - Consider 2 kg of water in a cylinder blocked by a piston at 20 C, 200 kPa. Water is heated and piston starts to rise. When the piston reaches the blocks, the volume of water has doubled. Heating continues until the pressure also doubles. Calculate the work done by water and the amount of heattransfer. Consider the case that the piston is restricted by the linear spring. Initially the spring is at rest. Water is heated until the piston reaches the blocks. Just before it hits the blocks the pressure is twice the initial pressure. Calculate the work done by water and the amount of heat transfer by the time the piston reaches the blocks. 7 D H₂0arrow_forward1.5 kg of an ideal gas undergoes a process wherein the pressure decreases from 280 kPaa to 140 kPaa, while the volume increases from 0.045 cu.m to 0.135 cu.m. If the increase in internal energy for the process is 275 kJ and Cv =1.235 kJ/kg.K, find the change in enthalpy.arrow_forwardA 400 lbm object accelerates from 10.0 ft/s to 17.5 ft/s. How much work has been done?arrow_forward
- A 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_forwardIn a insulated rigid container there is helium gas being stirred by a paddle wheel using 0.02 hp for 30 minutes. Initially, the gas is 80 farheinheit and 50 psia and 2.8 lbm. Constant Specific heat of .753 Btu/lbm-F. What is the final temperature and the final pressure.arrow_forward3. 5 kg air with initial temperature of 100°C expands at a constant pressure of 2 bar to reach to a final volume 5 m3. A. How much work is done in this process? B. How much heat must be supplied for the expansion process?arrow_forward
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