Q2: : Which statements are true for source of requirements and which are false? If false, please give the correct answer. 1. Both Enthalpy and Work are state functions 2. A process is endothermic when AH is Negative 3. Enthaipies of Reaction is same as heat of reaction 4. Heat capacity is the amount of energy required to raise the temperature of 1 g of a substance by 1 K.

Q2: : Which statements are true for source of requirements and which are false? If false, please give the correct answer. 1. Both Enthalpy and Work are state functions 2. A process is endothermic when AH is Negative 3. Enthaipies of Reaction is same as heat of reaction 4. Heat capacity is the amount of energy required to raise the temperature of 1 g of a substance by 1 K.

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Similar questions

* Your answer is incorrect. A gas undergoes a process in a piston-cylinder assembly during which the pressure-specific volume relation is pv¹.2 = constant. The mass of the gas is 0.4 lb and the following data are known: p₁ = 160 lbf/in.², V₁ = 1 ft³, and p2 = 300 lbf/in.² During the process, heat transfer from the gas is 2.1 Btu. Kinetic and potential energy effects are negligible. Determine the change in specific internal energy of the gas, in Btu/lb. Δu = i | 76.53 Btu/lb
3) A piston-cylinder assembly contains a two-phase liquid-vapor mixture of H20 at 200 Ibfin"2 with a quality of 80%. The mixture is heated and expands at constant pressure until a final temperature of 480 deg F is reached Determine the work for the process, in Btu per Ib of H20 present. A 60.32 Btulb B. 50.32 Btulb C. 40.32 Btub D. 30.32 Btulb
HW4.pdf we/Desktop/FALL%202022/ENSC%202213%20-%20THERMO%20D/HWS/4/HW4.pdf + a) Temperature at the initial state in °C. 4) A liquid-vapor water mixture of 50% quality and equilibrium pressure of 1 bar (initial state) is heated to 280 °C (final state) in a rigid closed container. Calculate the following: b) Specific volume at the initial state in m³/kg. c) Specific internal energy at the initial state in kJ/kg. A d) Final pressure in bar. Don't interpolate. Find closest value from tables. f) Work done by the system in kJ/kg. (T) e) Specific internal energy at the final state (as determined in part (d)) in kJ/kg. g) Heat transferred to the system in kJ/kg. E
Determine the specific volume of superheated water vapor at P bar and T°C based on: a) the ideal-gas equation b) the generalized compressibility chart, and c) the steam tables. d) Determine the error involved in the first two cases. Select Case # 7 from the Table 1 for Pressure and Temperature Table 1 Given Pressure and Temperature Case # Pressure (bar) Temperature (°C) 1 40 440 2 40 500 40 540 4 40 600 60 440 6 60 500 7 60 540 8 60 600
Water contained in a piston-cylinder assembly undergoes two processes in series (point 1 to point 2 and point 2 to point 3): point 1: T1 = 100°C and P1 = 5bar point 2: 71= 151.9°C and P2 = 5bar and v2 = 0.300 .300 m³ point 3: 73= 200°C and v3 = .300" kg Use the thermodynamic tables A.2, A.3, and A.4 to answer the following questions: For questions 1, 3, and 5 choose from: subcooled water, saturated water, saturated liquid, saturated vapor, superheated vapor 1) What is the thermodynamic state of water at point 1: 2- What is the specific volume of water at point 1: 3) What is the thermodynamic state of water at point 2: 4) What is the quality of water (x) at point 2: 3) What is the thermodynamic state of water at point 3: 4) What is the pressure of water at point 3: (bar) On paper draw points 1, 2, and 3 on the following P-v and T-v diagrams and show the two processes. Add number values, units, and constant pressure or temperature lines if needed. Specify which table you used to find…
4. Which thermodynamic property is the best measure of the molecular activity of a substance? a. Enthalpy b. Internal energy c. Entropy d. External energy 5. A substance whose properties are uniform throughout a sample is referred to as a. A solid b. An ideal substance c. A pure substance d. A standard substance 6. Which of the following statements is true for an isentropic steady-flow process? a. P1 b. Work = -V(P2 – P1) P2 - V1 C. %3! P1 V2 d. T1 T2
2) 1 kg of air undergoes a thermodynamic cycle consisting of three processes. Process 1-2: constant volume while heat is added, Process 2-3: constant temperature expansion, Process 3-1: constant pressure compression, at state 1, the temperature is 300 K, and pressure is 100 kPa. At state 2, the pressure is 200 kPa. Employing the ideal gas law and assuming constant specific heat at room temperature: a. Determine the temperature at state 2, in K. b. Determine the specific volume at state 3, in m³/kg. c. Sketch the cycle on P-v diagram. d. Calculate the boundary work for the cycle in kJ. e. Calculate the amount of heat transferred in each process (1-2, 2-3, and 3-1) and for the whole cycle (kJ). Air (1kg) T₁ P₁ V₁
In a fixed volume tank, there is initially 0.8 kg of superheated water vapor at a temperature of 300°C and a pressure of 1 MPa. The final temperature drops to 120°C by drawing heat from the container and it is observed that the water has partially condensed. According to this; a) Volume of the tank b) Final state dryness x=?c) The amount of heat withdrawn from the tank as absolute value?
A piston cylinder device with stops as shown contains water initially at 25 C and 100 kPa "State 1". Heat is then added, and piston moves till it hits the stops where cylinder contains two phase mixture with quality x,-0.661 "State 2". Heating continues until final Pressure is 300 kPa "State 3". Piston Piston Qin 1) What is the final specific volume (m /kg)? 0.9864 1.1202 1.0440 1.2217 None of the above 2) What is the boundary work (kJ/kg)? 104.30 111.92 98.54 122.07 None of the above 3) What is the final Temperature ("C)? 408.0 371.1 457.1 522.6 None of the above
A) Steam enters a turbine at a pressure of 30 bars, temperature of 400 degrees Celsius and exits at a pressure of 1bar. The turbine is isentropic, how much power is produced per unit mass flow rate, w. Their is no change in kinetic or potential energy and no heat transfer. Answer in kJ/kg B) Steam enters a turbine at a pressure of 30 bars, temperature of 400 degrees celsius and exits at a pressure of 1bar. If the turbine is operating at 95% isentropic efficiency, how much power is being produced per unit mass flow rate, w. Their is no change in kinetic or potential energy and no heat transfer. Answer in kJ/kg C) Steam enters a turbine at a pressure of 30 bars, temperature of 400 degrees celsius and exits at a pressure of 1 bar. If the turbine at 95% isentropic efficiency, what is the quality of the steam exiting the turbine? Their is no change in kinetic or potential energy and no heat transfer.
4. A vessel with 8.0 g of helium gas follows the two-step process, 123, shown in the figure to the right. a) Qualitatively describe what is being done to the gas vessel in the two processes. b) Find the values of V₁, V3, P2, and T3. P2 2 atm 0 P 657°C 2 37°C- 1 V₁ Isothermal 3 V3 V
1. In general, the internal energy U depends on both temperature and volume, U=U(TV). The volume dependence comes from the potential energy due to the interactions among the particles. For free particles, there are no interactions, thus, the internal energy U should be independent of the volume, i.e., = 0. Verify this result for ideal gas pV = RT. au av