. Two kilograms of air at a pressure of 2.25 MPa and temperature of 27C is heated at constant volume to a final pressure of 2.5 MPa. Compute for the: a. Change in internal energy b. Change in enthalpy c. Change in entropy d. Heat transferred e. Non-flow work

Q: Exactly 10 kg of steam entered a heat exchanger at 100 bar and 560o C. At the exit the Steam was at…

A: Given data,

Q: A mechanical refrigerating system employing R-134a is operated under such conditions that the…

A: Given data: Refrigerant used is R134a                     Evaporator temperature = 4°C…

Q: Q2: A perfect gas has a kinetic energy at inlet the compressor 8 m/s at rate of 0.35 kg/s, where the…

A: Given ,  At the inlet to compressor- C1  = 8 m/s         m =0.35 kg/s         v1 = 0.77 m3 /kg…

Q: Qi: One kg of steam undergoes a reversible isothermal process from 20 bar and 250°C, to a pressure…

A:

Q: 1.1 Determine the electrical power supplied to a boiler when the temperature of the entering water…

A: Consider the following diagram for the boiler system, the heat input is Ql and heat loss from the…

Q: Q2. ( A steam generation unit in power plant operates at a constant pressure of (8 bar) and the…

A: Let the inlet denotes state 1 and outlet denotes state 2 Given, m˙=500 kg/h=5003600 kg/s=0.1388 kg/s…

Q: A piston cylinder device with stops as shown contains water initially at 25 C and 100 kPa "State 1".…

A: Given: Temperature at state 1=25°CPressure at state 1=100kPaDryness fraction at state…

Q: In a polytropic process equation PV = C. If n = co, the process is termed as

A: In a polytropic process equation PVn=C, If n=∞, the process is termed as Answer: d) Constant Volume…

Q: 434 An air-conditioning system is shown in Fig. P4.54 in which air flows over tubes carrying…

A:

Q: O A pistoncylinder arrangement, cotains oxygen at 200 kPa, 350°C. The 40-kg piston has a diameter of…

A:

Q: A closed system of 2 kg of alr initially at a pressure of 5 bar and temperature 227° C expands…

A: Given that,       m=2 kg, p1=5 bar=500 kPaT1=227°C=227+273=500 Kp2=2 bar=200 kPa,  law of process is…

Q: A piston-cylinder system contains an ideal gas. The initial conditions are T₁, P, and V. The system…

A:

Q: 6. An inventor comes to you with a device that produces work. She tells you helium gas at 10 atm and…

A:

Q: 1. An unknown mixture of diatomic gases (R = 196 N-m/kg-K, c/c, = 1.4) initially occupies a volume…

A:

Q: A gas compressor draws in 600 m³/min at 27°C and 120 KPa. What would be the mass flow rate of gas if…

A: Given data: The volume is, v=600 m3/min. The pressure is, p=120 kPa. The gas constant is, R=300…

Q: Air at 30°C Dry-bulb temperature, 40% RH enters a heating chamber at the rate of 500 cmh (cu.m/hr).…

A: Given:Air condition at the inlet, T1=30oC dbt, ϕ1= 40% RHAir volume flow rate at inlet, V1˙=500…

Q: Two rigid tanks are filled with water. Tank A is 0.2 m' at 200 kPa, 150 °C and tank B is 0.3 m at…

A: Given that, Volume of tank A is, VA=0.2 m3Pressure in tank A is, PA=200 kPa,Temerature in tank A is,…

Q: 3.1) A plunger-cylinder that initially contains 0.55 kg of air at a temperature of 250 °C and a…

A:

Q: A vertical, frictionless piston-and-cylinder arrangement contains 2 lb of steam at 400 psia, 500°F.…

A: Given data as per the question mass= 2lb=0.907185 kgp1=400 psi=2757.9 kpaT1=500 F=533.15…

Q: (b) Steam at 4 MPa and 400 °C enters a nozzle steadily with a velocity of 60 m/s, and it leaves at 2…

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Q: 19. A rigid tank contains nitrogen at 30 atm, 70 °F. Nitrogen is heated until its temperature…

A: Given data,  P= 30 atm.  T1=70°F  T2=150°F  Tank is rigid .

Q: Air occupies a 0.5-m' tank. It starts at a pressure of 5 bar and a temperature of 300 K. Energy…

A:

Q: 6. A piston-cylinder device compresses steam from 10 kPa to 50 kPa while containing 12 kg of…

A:

Q: 3-76 A system consisting of 2 kg of ammonia undergoes a cycle composed of the following processes:…

A: Given data as per question Mass of ammonia =2 kg Initial pressure =10 bar Dryness fraction =0.6…

Q: Integration of dQ/S is less than zero for irreversible process Select one: O True O False

A:

Q: find the work done in the whole process in kJ. Draw the P-V diagram for the cycle.

A:

Q: Q3: Air undergoes a three-process cycle. if the processes are :12: constant- pressure expansion .2→…

A: Process 1-2: Constant pressure compression Process 2-3: Constant volume Process 3-1: Constant…

Q: 100kg of water at 75C and 1 bar is heated in a boiler to superheated steam at 5 bar and 350C.…

A: Use steam table to solve this problem,

Q: A perfect gas undergoes a process according to the law, T c 2/5 V a0. Initial pressure and volume…

A: We know that a perfect gas goes through a procedure that follows the law T∝V-25.1 bar and 0.14 m3…

Q: 200Kg/min superheated steam at 40 bar and 350C enters a turbine through a 7.5cm ID pipe. It exits at…

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Q: For a certain gas with constant, R = 320 J/(kg-K) and constant volume specific heat, Cv = 184…

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Q: 5. Two kilogram of certain gas with R 0.218 kJ/kg-Kundergoes a process and results to the following…

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Q: 1. Outside air of an air conditioning system is 25% of recirculated air. Determine the mass of…

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Q: 1.4 1kg of a fluid expands reversibly according to a lincar law from 4.2 bar to 14 bar; the initial…

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Q: Given : STEADY STATE COMPRESSOR INLET PRESSURE: IN LET VOLUMETRIC AIR 15 lb f/in² FLOW RATE GOES…

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Q: An Isobaric process is done on steam where it is heated to 200 C at 1.1 MPa. It was initially a…

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Q: Calculate the energy requirement to raise the temperature of 1 kg of water from 60 ° C of water to…

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Q: Calculate the compressor work in kJ required to compress 1 kg of an ideal gas from an initial volume…

A:

Work and Heat Transfer

It is generally related to thermal engineering which tells about the use, creation, conversion and transfer of heat energy between the systems. It is also considered that to transfer heat from one source to another, transfer of masses is also required. There are various mechanisms by which, transfer of heat takes place i.e. thermal conduction, convection, radiation or by change of phase. All these mechanisms have their own specific features which sometimes occur simultaneously within the same system.