Q2/(A): What are the various types of open system ? BA particular substance undergoes a mechanically reversible process expanding from an initial state of 20 bar to a final state of 8 bar. The path for the process is described by the equation: 0.036 , Where P is in bar and v is in m. if AU for the P= change of state is ( - 1400 I), Determine W, Q and AH?
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- 2. a. Take B °C, then convert it to Fahrenheit and Kelvin. b. Find the amount of heat needed to change the temperature of B g of ice from -D °C to B °C. The specific heat of water is 4186 J/kg °C, Latent heat of fusion is 3.33 x105 J/kg, laten heat of vaporization 2.25 x 106 J/ kg. c. A patient of mass B kg is spiking a fever of 105 Fahrenheit. The patient is immersed in ice bath 0°C ice to reduce the fever immediately back down to 98.6 Fahrenheit. How much ice must melt (bath stays at 0°C water) for this temperature reduction to be achieved? Latent heat of fusion is 3.33 x105 J/kg. and Specific heat of body is 3500 J/kg °C. d. A Styrofoam ice box has a total area of C/100 m² and walls with an average thickness of 2.50 cm. The box contains beverages at 0°C. The inside of the box is kept cold by melting ice. How much ice melts in one day if the ice box is kept in the trunk of a car at 35.0°C? Thermal conductivity of ice 0.010 J/s m ºC, Latent heat of fusion is 3.33 x105 J / kg. B:27.0…Carbon dioxide (CO2) contained within a piston cylinder undergoes three processes in series: = p1 10 bar, V₁ = 0.25 m³, to V₂ = 2.3 m³ during Process 12: Expansion from which the pressure-volume relationship is pV = constant Process 23: Constant volume heating from state 2 to state 3 where p3 = 10 bar Process 31: Constant pressure compression to the initial state. Sketch (don't have to use a computer) the process in series on a pV diagram (p on y-axis, V on x-asix) and evaluate the moving boundary work for each process.1. A certain ideal gas Y has molecular weight of 25 g/mol and specific heat ratio of 3. Initially, Y has pressure of 200kPa and volume of 2m3. The volume was doubled during heat transfer. Find the heat transfer if it underwent a process described by ( a. n=1 b. n=Cp/Cv C. n=2
- Consider the following: 1. When gas is heated at constant volume, its pressure and temperature will decrease. P, = P. , Volume V, 3. Change in internal Energy is equals to change in heat transfer 4. The value of the work done is zero. Which of the above condition relates with isochoric process? Select one: O a. 1,2 and 4 only O b. 1 and 3 only O c. 3 and 4 only O d. 1, 2, 3 and 4 2. PressureA cylihder ftted with a pi3 ton contans water at 16 bar and 400C.Water 3 Cooled by following two in series paths (Consecutively) Path 1-2 :water 3 Cooled to saturated while presswe vapor state remans Constaut. Path 2-3: water r3 Cooled to the pressure of 8 bar while volume remans constart. a) Sketch a both paths on P-v and T-y diagramd 6) what B the temperatwe of the at the end of the water process? c) Determihe the final state of water, If As mixture, evaluate the quality (x). d) Calcula te the work as kJ lkg for overall process. e) Calculate the heat trasfer as gikg for overall process.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.
- Q7. The series of states through which a -- system passes during a process is called process O path O cycle phases O Q6. Zeroth law of thermodynamics deals with conversion of mass and energy. O deals with heat engines. O deals with the thermal equilibrium of two systems with a third system. deals with variation of pressure and volume.A piston/cylinder arrangement contains 2 kg of ammonia at a temperature 132.45 ℃ and a pressure 5 MPa. The piston floats. Heat is added to the system until the temperature of ammonia reaches 416.37 ℃. (a) Determine the phase of ammonia during the whole process (from the initial to the final state). [Hint : Use the tables in App. 5]. b) Show the initial and final points of the process in a T-s and p-v diagram. In both diagrams sketch the dome. Show these two points relative to the dome. (c) Determine the initial and final volume of the piston/cylinder arrangement using tables. (d) Determine the useful work and the heat transfer using tablesQ1. (Reading: Çengel and Boles, Thermodynamics: An Engineering Approach, 8th Ed., Pages 307-311) The amount of energy waste by a refrigerator increases by a number of malpractices. For example; opening the refrigerator door frequently will increase energy waste as the warmer air outside replaces the cool air inside. It is also not recommended to place the hot foods into the refrigerator before cooling them to the room temperature. Imagine a typical household refrigerator with an internal temperature of 4 °C. The refrigerator has a coefficient of performance of 1.4. The internal dimensions of this refrigerator are 186 cm (height) x 84 cm (width) x 75 cm (depth). The half of the refrigerator volume is used for storing food items. The air filling the other half of the refrigator volume contains 0.004 kg moisture/kg air on average. While the moisture content of the air in the kitchen is 0.01 kg/kg air, the temperature and pressure in the kitchen are 23°C and 97 kPa, respectively. Assuming…
- 2.33 Carbon monoxide gas (CO) contained within a piston- Process 1-2: Expansion from p, 5 bar, V = 0.2 m' to Process 2-3: Constant-volume heating from state 2 to state Process 3-1: Constant-pressure compression to the initial V, = 1 m'. during which the pressure-volume relationship is cylinder assembly undergoes three processes in series to pV = constant. 3, where p3 5 bar. %3D state. Sketch the processes in series on p-V coordinates and msi uate the work for each process, in kJ.2. A gas undergoes a thermodynamic cycle consisting of the following processes:i) Process 1-2: Constant pressure p1 = 1.4 bar, V1=0.028 m3, W1-2=10.5 kJii) Process 2-3: Compression with pV=Constant, U3=U2iii) Process 3-1: Constant Volume, U1-U3 = -26.4 kJThere are no significant changes in KE and PEi) Sketch the cycle on a p-V diagramii) Calculate the network for the cycle in kJiii) Calculate the heat transfer for process 1-2iv) Show that ƩW = ƩQM: Constarm h=chang Q2. Heat cannot be zero in closed system (True/False). ( F cee Q1. Work cannot be zero in closed system (True/False) Q3. First law of thermodynamics is not based on the law of conservation of energy (True/False), Q4. The change in the total energy of the closed system is -Q5. The sum of the'energiesCarried by the mass in open system is.Mashalase Emi =Eme Q-w=AH fluichProleabie.haT ehange with Time Q6. The general form of first law of thermodynamics for open system.. Q7. Un steady state flow process is defined as. internal+ Q8. Enthalpy is defined sum of kinetic and flow energy (True False), 09. Cyclic process is defined as.wha.h.ystem start from initial state trour, L diffrent Processes and .e.k... Q10. Internal energy is considered in open system (True/False)İ