Concept explainers
For a homogeneous (single-phase) simple pure substance, the pressure and temperature are independent properties, and any property can be expressed as a function of these two properties. Taking v = v(P, T), show that the change in specific volume can be expressed in terms of the volume expansivity β and isothermal compressibility α as
Also, assuming constant average values for β and α, obtain a relation for the ratio of the specific volumes v2/v1 as a homogeneous system undergoes a process from state 1 to state 2.
12–89 Repeat Prob. 12–88 for an isobaric process.
Want to see the full answer?
Check out a sample textbook solutionChapter 12 Solutions
Thermodynamics: An Engineering Approach ( 9th International Edition ) ISBN:9781260092684
- Question 1: Derive the thermodynamic equation of state (dH/dP)_T = V-T(dV/dT)_P Derive an expression for (dH/dP)_T for an ideal gas and for a van der Waals gas. For the van der waals gas, estimate its value for 1.0 mol of Ar(g) at 298K and 10 atm. Question 2: Show that the slope of compressibility factor Z as a function of pressure as P ---> 0; at isothermal conditions is related to the van der waals parameters by: Limit (P-->0) dz/dP = (b-a/RT)/RTarrow_forwarddioxide (CO,) exists at-40°C in a 0.05 m tank. Determine 3.16 Two kg of a two-phase, liquid-vapor mixture of carbon the quality of the mixture, if the values of specific volume for saturated liquid and saturated vapor CO, at -40C are vy = 0.896 x 10 m/kg and v, = 3.824 x 10 m'/ka respectively.arrow_forwardDerive an expression for the specific heat difference of a substance whose equation of state is: P=[(RT)/(v-b)]-[a/(v*(v+b)*T1/2)] Where a and b are empirical constantsarrow_forward
- 0.25kg/s of Catbon Dioxide (R 0.1889 kJ/kg-K, k 1.289) undergo a certain process in a close system from initial volume and temperature of 268cm' and 134K to a final volume and temperature of 804cm' and 402K respectively. From the data given, perform necessary analysis in determining the type of process to further solve the following questions as follow: a. Work done by/on the system (kJ/s) b. Change in Entropy (kW/K) c. Heat added/rejected by the system (kJ/s)arrow_forwardDetermine the volume for water vapor at 200 bar and 470 oc at 10kg, using (a) ideal gas equation (b) data from the compressibility chart. (c) data from the steam tables. Also find the error percent.arrow_forwardPlease help. You can get the pressure-enthalpy diagram of N2 onlinearrow_forward
- An ideal gas is confined to one side of a rigid, insulated container divided by a partition. The other side is initially 500 K, and V1 =0.2 m³. When the partition is removed, the gas expands to fill the entire container, which has a total volume of 0.5 m³. Assuming evacuated. The following data are known for the initial state of gas: P1 = 5 bar, T1 %3D that there is no change in the internal energy of the gas, determine the (a) pressure, in bar and the (b) product of mass, specific gas constant and T in the final state (in kPa-m³).arrow_forwardThermodynamics question. Answer using Benedict-Webb-Rubin equation of state.arrow_forwardP2. A piston-cylinder device that initially has a volume of 0.03 m3 contains inside it saturated steam at 30 bar. The substance is cooled at constant volume until its temperature reaches 2000°C. The system is then expanded at constant temperature until the volume is twice the initial volume. Plot the thermodynamic processes on a phase diagram, determine the quality of thermodynamic state 2, and the approximate final pressure.Answer: 1.5538 MPa, 0.51918, 1.5 MPa.arrow_forward
- For a piston-cylinder assembly with the initial conditions (a two-phase mixture of steam and water with a mass of 0.9 kg, a temperature of 160 °C, and a quality of 0.6). Find the work performed by an isothermal expansion that results in a mixture with a quality of 0.95.arrow_forwardParts ,g,h,i,jarrow_forwardDetermine the coefficients of expandability, compressibility and pressure increase for a gas with equation of state (P + b) v = RT, where b is constant.arrow_forward
- Elements Of ElectromagneticsMechanical EngineeringISBN:9780190698614Author:Sadiku, Matthew N. O.Publisher:Oxford University PressMechanics of Materials (10th Edition)Mechanical EngineeringISBN:9780134319650Author:Russell C. HibbelerPublisher:PEARSONThermodynamics: An Engineering ApproachMechanical EngineeringISBN:9781259822674Author:Yunus A. Cengel Dr., Michael A. BolesPublisher:McGraw-Hill Education
- Control Systems EngineeringMechanical EngineeringISBN:9781118170519Author:Norman S. NisePublisher:WILEYMechanics of Materials (MindTap Course List)Mechanical EngineeringISBN:9781337093347Author:Barry J. Goodno, James M. GerePublisher:Cengage LearningEngineering Mechanics: StaticsMechanical EngineeringISBN:9781118807330Author:James L. Meriam, L. G. Kraige, J. N. BoltonPublisher:WILEY