Energy transfer for which the sole effect on everything external to the system could have been the raising of a weight.
Q: of 2 kg in a closed system undergoes three processes in series: Process 1-2: isochoric process from…
A: Given data p1 = 1 bar, V1= 4 m^3 P2 = 2 bar V3 = 2 m3 V4 = 1 m3 Mass of gas (m) = 2 kg
Q: A closed system consisting of 10 Ib of air undergoes a polytropic process from p1 = 80 lbf/in?, v1 =…
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Q: At steady state, a heat pump provides energy by heat transfer at the rate of 25,000 Btu/h to…
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Q: Refrigerant 134a flows through a horizontal tube with an inside diameter of 5 cm. The refrigerant…
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Q: How work can always be converted to heat directly and completely, but the reverse is not true.
A: Both work and heat are the two different forms of energy. Heat is the energy interaction because of…
Q: A gas is contained in a 0.5 m3 rigid tank. The gas receives a paddle work of 5.5W for 30 mins. At…
A: In the above question, the work is applied supplied to the tank which has a constant volume, thus…
Q: Heat transfer through a temperature difference is irreversible,
A: An irreversible process is a process during which if a process is reversed it cannot achieve its…
Q: Thermal mass is a property of the mass of a building which enables it to store:
A: Thermal Mass: The ability of a material to absorb and store heat or thermal energy is a Thermal…
Q: As shown in figure below, 5 kg of steam contained within a piston–cylinder assembly undergoes an…
A: Given, mass of steam, m=5kginternal energy of steam at state1, U1=2709.9KJ/kgInternal energy of…
Q: thermodynamics steady flow system receive 5kg/min of fluid where P1=138 kPa, V1=0.042 m3/kg…
A: 1 Thermodynamics steady flow system:- P1 = 138 kPa , V1 = 0.042 m3/kg C1 = 122 m/s…
Q: A closed system consists of gas of 2 kg initially in state 1 with p1 = 4bar and specific volume 1m³…
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Q: Consider the PV diagram as shown above when a thermodynamic system changes its state from state a to…
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Q: A system consisting of 3 lb of water vapor in a piston–cylinder assembly, initially at 350°F and a…
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Q: A closed stationary system consists of 2 kg mass. During a certain process, 20 kJ of work is done on…
A: Given Data m=2 kg W=-20 kJ ∆u=40 kJ/kg
Q: A closed system undergoes a thermodynamic cycle with three steps: process 1-2 (from state 1 to state…
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Q: An open system has a mass transfer across its boundaries, and the mass within the system is not…
A: It is required to provide the definition of open system.
Q: 3) From an initial state where the pressure is p1, the temperature is T1, and the volume is V1,…
A: Since process 1-2 is a constant temperature process. initial pressure =p1 final pressure = p2 = 2p1…
Q: 2. A gas expands in a piston-cylinder assembly from an initial pressure of 800 kPa and a volume of…
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Q: A gas within a piston-cylinder assembly undergoes a process from a state where P = 100 kPa, V = 0.09…
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Q: A gas in a piston–cylinder assembly undergoes a process for which the relationship between pressure…
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Q: A closed system consists of gas of 2 kg initially in state 1 with P1 = 4bar and specific volume v1 =…
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Q: It is the sum of the internal energy of the system and its work nonflow. a. Enthalpy b. Heat c.…
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Q: A closed system consisting of 2 lb of a gas undergoes a process during which the relation between…
A: a) density is calculated using 1/v1 and 1/v2 volume = mass/density b) P1V1n=P2V2n
Q: /Four kilograms of a certain gas is contained within a piston-cylinder assembly. The gas undergoes a…
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Q: A system is taken from state A to state B along two different paths 1 and 2. The heat absorbed and…
A: Given:-Initial state AHeat absorbed=Q1Work done=W1Final state BHeat absorbed=Q2Work done=W2To…
Q: (1-2); constant pressure (2-3); and polytropic where n = 1.6, (3-1). Given that p1 = 100 kPa, T1 =…
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Q: Steam in a piston-cylinder assembly undergoes a polytropic process, with n = 2, from an initial…
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Q: A gas contained within a piston–cylinder assembly undergoes three processes in series: Process 1–2:…
A: Process 1–2: Constant volume, state 1, p1 = 1 bar, V1 = 6 m3 , state 2, p2 = 2 bar Process 2–3:…
Q: Water in a piston-cylinder assembly, initially at a temperature of 133.6°C and a quality of 60%, is…
A: To find (a) The mass of water m. (b) The heat transfer Q. Given The initial temperature of the…
Q: If mass, heat, and work are not allowed to cross the boundaries of a system, the system is called A…
A: Explanation: The heat, mass and work are not allowed to cross the boundaries of the system is called…
Q: "Heat and work are not mutually convertable in the system
A: Given: To define: Heat and work are not mutually convertible in the system it states: And the type…
Q: (b) Prove that, whenever a system undergoes a cycle,
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Q: The system total energy is always conserved, when (mark all): a) a closed system undergoes a…
A: First law of thermodynamics states that energy can neither be created nor destroyed, rather it…
Q: A property whose value for an overall system is the sum of its values for the parts into which the…
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Q: A gas contained within a piston-cylinder assembly undergoes three processes in series: Process 1-2:…
A: A definite area or space is called system. State is the condition of the system. Process is the…
Q: Give an example of in the absence of any work interactions, the energy change of a system is equal…
A: According to the first law of thermodynamics δQ-δW=∆E
Q: A closed system loses energy by heat transfer at the rate of 10kJ/s. If the system operates at…
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Q: 5.72 As shown in Fig. P5.72, a heat pump provides energy by heat transfer to water vaporizing from…
A: Given: For water in pipe At 1 P1 = 2 bar Saturated liquid At 2, P1 = 2 bar Saturated vapor Heat…
Q: Closed system can exchange energy and matter
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Q: Consider the case of a non isolated system that is one that does interact with its surroundings,…
A: According to the 1st law of thermodynamics, the net heat added to the body is equal to the net work…
Q: Air in a closed piston-cylinder arrangement is expanded from the initial pressure of 9 bar and…
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Q: Refrigerant 134a expands in a piston–cylinder assembly from p1 = 140 lbf/in2 and T1 = 140°F to p2 =…
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Q: A closed system consists of gas of 2 kg initially in state 1 with P1 = 4bar and specific volume 1m³…
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Q: A gas in a piston-cylinder assembly undergoes a process during which its volume reduces from 2 m° to…
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Q: A gas in a piston–cylinder assembly undergoes a compression process for which the relation between…
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Q: A closed system consists of gas of 2 kg initially in state 1 with p1 = 4bar and specific volume 1m3…
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- Explain the energy is recognized as heat transfer only as it crosses the system boundary?A room for four persons has two fans, each consuming 0.14 kW power and three 100 Wlamps. Ventilation air at the rate of 80 kg/h enters with an enthalpy of 85 kJ/kg and leaveswith an enthalpy of 60 kJ/kg. If each person puts out heat at the rate of 630 kJ/h, determinethe rate at which heat is to be removed by a room cooler, so that a steady state is maintainedin the room.3. An air compressor which operates at 900 rpm has a piston displacement of 4500cm3. Determine the mass flow rate of air at standard density considering that the volumetric efficiency is 77%. a. 314.57 kg/hr b. 324.35 kg/hr c. 137.54 kg/hr d. 224.53 kg/hr Please answer this immediately. Thank you!
- A gas contained in a vertical cylindrical tank has a volume of [10 + (162/100)] m3. The gas receives a paddle work of 7.5 W for 1 hours. If the density of the gas at the initial state is 1.5 kg/m3, determine the specific heat gain or loss if the specific internal energy of the gas increases by [(K/10) + 5] kJ/kg .Q19: A stationary mass of gas is compressed without friction from an initial state of 2 m3 and 2*105 N/m2 to a final state of 1 m3 and 2*105 N/m2 , the pressure remaining the same. There is a transfer of 360 kJ of heat from the gas during the a process. How much does the internal energy of the gas changeA 25 kW automobile engine consumes 1.25 kg of gasoline when it runs for 10 minutes. What is the efficiency of the engine since the lower calorific value of gasoline is 43000 kJ / kg?
- can we do energy balance using the equation of first law of thermodynamics if the system is open? Explain.Steam expands steadily at a constant temperature. The flow rate is 13.6 kg/min with an inlet state of wet steam (water) at 80% quality to a final state of 70°C and 2.5 MPa. The change of kinetic energy across the device is 3.5 kJ/kg, and the heat added is 21.81 kW. Determine (a) the enthalpy of conditions 1&2, (b) the heat transfer in kJ/kg. (c) the work, and (d) the system power.A steady state flow compressor draws in 14170 li/min of air whose density is 1.267 kg/m3 and discharge it with density of 4.88 kg/m3. At the suction, P1-103.42 kPa, at the discharge, p2=551.584 kPa. Thge increase in specific internal energy is 78.45 kJ/kg and the heat from air by cooling is 30.173 kJ/kg. Neglecting the change of potential and kinetic energy, determine the work done on the system in kJ/min.
- A piston cylinder assembly contains 0.45 kg of air and is fitted with electrical resistor. The mass ofthe piston is 60 kg and with a face area of 980 cm2. The heat transfer produced by the electric currentpasses through the resistor is 21kJ that caused the volume to increase by 47L, while maintaining aconstant pressure. At initial and final state, the air and the piston are at rest. Neglect friction effectsand take the local acceleration of gravity as g = 9.81 m/s2. Determine the change in internal energy,in kJ.A gas contained in a vertical cylindrical tank with a height of 3m and diameter of 5 m. The gas receives a paddle work of 15.3 W for 2 hours. If the density of the gas at the initial state is 2.3 kg/m3, determine the change in specific internal energy of the gas. a. 67.3 J/kg b. 5.25 kJ/kg c. 26.3 J/kg d. 3.25 kJ/kgAn oil-transfer pump uses 1 kW of power in transferring 5 kg/s of oil through a 3-cm-diameter pipe. The changes in kinetic and potential energies are essentially zero, and the process is adiabatic. Additionally, there is no appreciable temperature change in the oil, which has a density of 1500 kg/m³. Determine the change in pressure from inlet to exit.