FUNDAMENTALS OF THERMODYNAMICS
10th Edition
ISBN: 9781119803645
Author: Sonntag
Publisher: WILEY
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Chapter 2, Problem 2.80P
A container with liquid nitrogen at
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A 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.
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The molar specific heat at constant volume of an ideal gas is equal to 2.5times the universal gas constant (8.314J/mol-K). When the temperature increases by 150K. Find the change in molar specific enthalpy.
Chapter 2 Solutions
FUNDAMENTALS OF THERMODYNAMICS
Ch. 2 - Are the pressure in the tables absolute or gauge...Ch. 2 - What is the minimum pressure for liquid carbon...Ch. 2 - When you skate on ice, a thin liquid film forms...Ch. 2 - Is it possible to have water vapor at 5 ?Ch. 2 - At higher elevations, as in mountains, air...Ch. 2 - Water at room temperature and room pressure has...Ch. 2 - Can a vapor exist below the triple point...Ch. 2 - Ice cubes can disappear and food can dry out...Ch. 2 - In Example 2.lb, is there any mass at the...Ch. 2 - Prob. 2.10P
Ch. 2 - Locate the state of R410A at 500kPa,10C . Indicate...Ch. 2 - How does a constant-v process for an ideal an as...Ch. 2 - Prob. 2.13PCh. 2 - As the pressure of a gas becomes larger, Z becomes...Ch. 2 - Carbon dioxide at 280K can be in three different...Ch. 2 - Find the lowest temperature at which it is...Ch. 2 - Water at 27C can exist in different phases,...Ch. 2 - Dry ice is the name of solid carbon dioxide. How...Ch. 2 - A substance is at 2MPa and 17C in a rigid tank....Ch. 2 - Determine the phase for each of these cases a....Ch. 2 - Determine the phase of water at a. T260°C.P5MPa b....Ch. 2 - Determine the phase of the substance at the given...Ch. 2 - Give the missing property of PvT and x for water...Ch. 2 - Determine whether refrigerant R410A in each of the...Ch. 2 - Show the states in Problem 2.24 in a sketch of the...Ch. 2 - Fill out the following table for substance...Ch. 2 - Place the two states ab listed in Problem 2.26 as...Ch. 2 - Determine the specific volume for R410A at these...Ch. 2 - Place the three states ac listed in previous...Ch. 2 - Find P and x for CH4 at a. T=155K,v=0.04m3/kg b....Ch. 2 - Give the specific volume of carbon dioxide at 40C...Ch. 2 - You want a pot of water to boil at 105C . How...Ch. 2 - Water at 400kPa a quality of 75 has its pressure...Ch. 2 - Saturated water vapor at 200kPa is in a...Ch. 2 - Saturated liquid water at 60C is put under...Ch. 2 - A constant pressure piston cylinder has water at...Ch. 2 - A glass jar is filled with saturated water at...Ch. 2 - Saturated vapor R4l0A at 60C has to pressure...Ch. 2 - Ammonia at 20C with a quality of 50 and a total...Ch. 2 - Repeat the previous problem if the outlet valve is...Ch. 2 - R134a is in a sealed, rigid vessel of 2m3 as...Ch. 2 - A storage tank holds methane at 120K , with a...Ch. 2 - A 400m3 storage tank is being constructed to hold...Ch. 2 - Carbon dioxide at 6000kPa,40C is cooled in a...Ch. 2 - A pressure cooker has the lid screwed on tight. A...Ch. 2 - A 1m3 tank is filled with a gas at room...Ch. 2 - A pneumatic cylinder (a piston cylinder with air)...Ch. 2 - Is it reasonable to assume that at the given...Ch. 2 - Helium in a steel tank is at 250kPa,300K with a...Ch. 2 - A spherical helium balloon l0m in diameter is at...Ch. 2 - A glass is cleaned in hot water at 35°C and placed...Ch. 2 - Air in a car tire is initially at 10C and 190kPa ....Ch. 2 - A rigid tank of 1m3 contains nitrogen gas at...Ch. 2 - Assume we have three states of saturated vapor...Ch. 2 - Do Problem 2.54 for R-410A Assume we have three...Ch. 2 - Do problem 2.54 for the substance ammonia. Assume...Ch. 2 - A cy1inica1 gas tank 1m long, with an inside...Ch. 2 - Ammonia in a piston cylinder arrangement is at...Ch. 2 - Find the compressibility factor (Z) for saturated...Ch. 2 - Find the compressibility factor for methane at a....Ch. 2 - Find the compressibility for carbon dioxide at 60C...Ch. 2 - What is the percent error in specific volume if...Ch. 2 - Estimate the saturation pressure of R142b at 300K...Ch. 2 - A bottle a volume of 0.1m3 contains butane with a...Ch. 2 - Find the volume of 2kg of ethylene at 270K,2500kPa...Ch. 2 - Argon is kept in a rigid 5m3 tank at 30C and 3MPa...Ch. 2 - A new refrigerant, R152a . is stored as a liquid...Ch. 2 - Determine the pressure of nitrogen at...Ch. 2 - Determine the pressure of nitrogen at...Ch. 2 - Carbon dioxide at 60C is pumped at a very high...Ch. 2 - Solve Problem 2.70 using the Soave EOS. Notice...Ch. 2 - A tank contains 8.35kg of methane in 0.1m3 at 250K...Ch. 2 - Do the previous problem using the Redlich-Kwong...Ch. 2 - Do the Problem 2.72 using the Soave EOS.Ch. 2 - Determine the unknowns of T, v and x if two phase...Ch. 2 - Give the phase and the missing properties of P, T,...Ch. 2 - Refrigerant R410A in a piston/cylinder arrangement...Ch. 2 - Water in a piston cylinder is at 90C,100kPa , and...Ch. 2 - A tank contains 2kg of saturated ammonia vapor at...Ch. 2 - A container with liquid nitrogen at l00K has a...Ch. 2 - Determine the mass of methane gas stored in a 2m3...Ch. 2 - What is the percent error in pressure if the ideal...Ch. 2 - Prob. 2.83PCh. 2 - Use a linear interpolation to estimate the missing...Ch. 2 - Use a linear interpolation to estimate Tsat at...Ch. 2 - Use a double linear interpolation to find the...Ch. 2 - Cabbage needs to be cooked (boiled) at 250 F. What...Ch. 2 - Prob. 2.88EPCh. 2 - If I have 1ft3 of ammonia at 15psia,60F , what is...Ch. 2 - Locate the state of R410A at 30 psia, 20F ....Ch. 2 - A substance is at 300lbf/in.2,65F in a rigid tank....Ch. 2 - For water at 1 atm with a quality of 10 find the...Ch. 2 - Determine the phase of the substance at the given...Ch. 2 - Give the phase and the missing property of P, T,...Ch. 2 - Fill out the following table for substance...Ch. 2 - Give the phase and the specific volume for the...Ch. 2 - Give the missing property of P, T, v, and x for a....Ch. 2 - Saturated liquid water at 150F is put under...Ch. 2 - You want a pot of water to boil at 220F . How...Ch. 2 - Saturated water vapor 240F has its pressure...Ch. 2 - Saturated vapor R4l0A at 100F has its pressure...Ch. 2 - A glass jar is filled with saturated water at 300F...Ch. 2 - A pressure cooker has the lid screwed on tight. A...Ch. 2 - Prob. 2.104EPCh. 2 - Repeat the previous problem if the outlet valve is...Ch. 2 - A cylindrical gas tank 3ft long, with an inside...Ch. 2 - A spherical helium balloon 30ft in diameter is at...Ch. 2 - Helium in a steel tank s at 36psia , 540R with a...Ch. 2 - A 35ft3 rigid tank has propane at 25psia,540R and...Ch. 2 - What is the percent error in specific volume if...Ch. 2 - Air in a car tire is initially at 10F and 30psia ....Ch. 2 - R4l0A at 200psia , 100F is cooled in a closed...Ch. 2 - Refrigerant- 410A in a piston cylinder arrangement...Ch. 2 - A substance is at 70F,300Ibf/in.2 in a 10ft3 tank....Ch. 2 - Estimate the saturation pressure of R142b at 540R...Ch. 2 - Determine the mass of an ethane gas stored in a...Ch. 2 - Determine the pressure of R410Aat100F,v=0.2ft3/ibm...Ch. 2 - What is the percent error in pressure if the ideal...
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- H.W: - 0.8m of gas at 8bar and 27°C is compressed isothermally until its volume is ¼ time the original volume, then its heated at constant pressure to original volume, finally its cooled at constant volume to original condition. Find: - a- the heat transferred. b- Work done c- Change in internal energy. (draw the processes on p-v diagram) Take cp=1.01kj/kg.k, R=0.28kj/kg.karrow_forwardI need quick solution with explanation. Answer seems to be 4.12kJarrow_forwardA frictionless piston-cylinder device as shown in Fig. Qlb contains water at 400 kPa and the water is heated at constant pressure from saturated liquid to saturated vapor. Then, the heating process is continued in an isobaric manner until its specific volume reaches the value of 0.5 mkg. Water Heat Figure Qlb i) What is the initial temperature of water in the cylinder? ii) What is the final temperature of water in the cylinder? iii) Calculate the total boundary work đuring the processes, kJ/kg. iv) Calculate the total amount of heat transferred during the processes, kJ/kg. v) Sketch both processes on a T – v diagram with respect to saturation lines.arrow_forward
- In a closed system, some water is heated to 50 oC. Then it is taken the air by vacuum in the system. What kind of observation would be expected regarding water in the closed system?arrow_forward(b) A frictionless piston-cylinder device as shown in Fig. Qlb contains water at 300 kPa and the water is heated at constant pressure from saturated liquid to saturated vapor. Then, the heating process is continued in an isobaric manner until its specific volume reaches the value of 0.7 m'/kg. Water Heat Figure Qlb i) What is the initial temperature of water in the cylinder? ii) What is the final temperature of water in the cylinder? iii) Calculate the total boundary work during the processes, kJ/kg. iv) Calculate the total amount of heat transferred during the processes, kJ/kg. v) Sketch both processes on a T – v diagram with respect to saturation lines.arrow_forwardOne kg. of gas is confined to a constant volume tank. Initial pressure and volume are 4 0.21m3 respectively. When a heat energy of 82 kJ is supplied to the system, the final temperature of the gas becomes 127 degrees C. Find (a) Work done. (b) Change in internal energy. (c) Specific heat at constant volume. Assume, R=300 Nm/kgK.arrow_forward
- A rigid container contains saturated vapour at 1.6 bar. The container is cooled by -440 KJ and the pressure drops to 1 bar. Calculate the mass of water in the container in kg. Neglect kinetic and potential energy changes. Note that the reported heat transfer is negative because energy is leaving the container. It is closed system As the container is rigid, the volume and total mass will stay the same between the initial and final state. This means that the specific volume of water will stay constant. Use the information in the bullet above to fine the quality of the mixture at the final state. Then, use the quality to perform the energy balance.arrow_forwardNonearrow_forwardHi, pls help me solve this problem. Thank you so much.arrow_forward
- Any idea of solving this? bit confusing :((arrow_forwardthermodynamics problemarrow_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_forward
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