A 0.50 kg copper ball and a 1.00 kg Iron block, both at 200 °C, were placed in 4 liters of mineral oil, at 20.0 °C, in a thermally isolated container. When the system reached thermal equilibrium, find (i) the final temperature of this system. (ii) the change of total internal energy of the system. (iii) the net change of the system entropy during the process. [Specific heats: mineral oil = 1.67 kJ/kg K, Cu = 387 J/kg K and Fe = 448 J/kg K]

A 0.50 kg copper ball and a 1.00 kg Iron block, both at 200 °C, were placed in 4 liters of mineral oil, at 20.0 °C, in a thermally isolated container. When the system reached thermal equilibrium, find (i) the final temperature of this system. (ii) the change of total internal energy of the system. (iii) the net change of the system entropy during the process. [Specific heats: mineral oil = 1.67 kJ/kg K, Cu = 387 J/kg K and Fe = 448 J/kg 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

(e) Any change that a system undergoes from one equilibrium state to another is called a process. What is a process during which the specific volume remains constant?
A piston-cylinder assembly contains a mystery substance that undergoes a series of processes. Process 1-->2: Constant pressure process at 5bar from v1=.07m3/kg to v2=.12m3/kg Process 2->3: Constant volume process to saturated vapor Process 3->4: Constant temperature process to quality of 50% Process 4->5: Constant volume process to 5bar Sketch the processes on Pt, Pv, and Tv, plots. Lable the axes including property values; use closed dots to show the states, use solid lines to connect the states, add number and arrows to make clear the states numbers and process directions. Could this be considered a thermodynamic cycle? Why or why not?
Question 1 (a) Determine if the systems with the known properties below are completely specified in terms of their states based on state postulate? Explain if the state of any system cannot be specified. (i) System 1: Density and specific volume (ii) System 2: Mass and temperature (iii) System 3: Pressure and specific enthalpy (iv) System 4: Total volume and specific internal energy (v) System 5: Temperature, total enthalpy, and mass (b) In piston cylinder device with valve assembly, the system that is defined by the dashed line boundary consists of air in the cylinder as shown in Figure 1. Both valves are closed and there is no leakage through the sidewall of the piston during the compression. Determine whether the following statements are true or false. Piston Figure 1 Valve Statement 1: All parts of the system boundary shown in Figure I are moving boundary. Statement 2: The compression process is quasi-equilibrium if the compression happens in a very fast manner. Statement 3: If…
Q6: The atmospheric air at 750 mm of Hg has 34° C dry bulb temperature and 19° C wet bulb temperature. Using psychrometric chart, find (a) partial pressure of vapor, (b) saturation pressure corresponding to 34° C, and (c) volume of air per kg of dry air. [Ans. 8.5 mm of Hg: 39.9 mm of Hg; 0.088 m3/kg of dry air]
2. A piston-cylinder assembly with stops (see figure) contains 1.54 kg of water initially occupying a volume of 1.25 m at a pressure of 1 bar (State 1). As the water in the assembly is heated, the pressure and temperature in the system remain constant until the piston contacts the stops. In this position (State 2), the quality, x2, is determined to be 92%. Heat continues to be added to the system at a constant volume until the system reaches a pressure of 1.5 bar (State 3). Determine the following quantities: а. X b. V2 (m2) C. W13 (kJ) d. Qu (kJ) e. Plot the results on a P-v diagram, labelling relevant P, T, and v values.
Answer the question quecly please
For H₂O, determine the specific volume at each of the indicated state, in m³/kg. (a) T = 600 ˚C, p = 20 MPa. (b) T = 80 °C, p = 20 MPa. (c) T = 60 °C, p = 2.5 MPa. Part A Determine the specific volume, in m³/kg, for state (a). m³/kg V = Part B Determine the specific volume, in m³/kg, for state (b). m³/kg V = Part C Determine the specific volume, in m³/kg, for state (c). m³/kg V =
please show solution step by step. Thermodynamics
What is v1 and u1?
An air-conditioning system made up of a compressor and heat exchanger is shown in the figure below. This system is operating at steady-state with air flowing through the heat exchanger while the refrigerant first flows through a compressor before entering the heat exchanger. The refrigerant and air do not mix in the heat exchanger. Two control volumes are defined in the figure and both of these control volumes are to be used to answer the questions from this problem. Rotating Shaft 3 Compressor Refrigerant 12 I Control volume B wwwwwww wwwww Heat Exchanger 1 1 I 5 Air Control _' volume A The air enters the heat exchanger (inlet marked 1 in the figure) at a temperature of -13 °C, volumetric flow rate of 0.03 m³/min, and pressure of 101 kPa. Upon exiting the heat exchanger, the air is at a temperature of 42 °C (outlet marked 2 in the figure). The air can be modeled as an ideal gas with gas constant of 287 J/kg.K. The refrigerant enters the compressor (inlet marked 3 in the figure) at a…
just part d answer options are 1.8kJ 1.3J 1.3kJ 1.8J
A 300-lb iron casting. initially at 600°F, is quenched in a tank filled with 2121 lb of oil, initially at 80°F. The iron casting and oil can be modeled as incompressible with specific heats 0.10 Btu/lb - °R. and 0.45 Btu/lb - °R, respectively. (a) For the iron casting and oil as the system.determine the final equilibrium temperature, in °F. Ignore heat transfer between the system and its surroundings. °F (b) For the iron casting and oil as the system,determine the amount of entropy produced within the tank, in Btu/°R. Ignore heat transfer between the system and its surroundings. Btu/°R