a certain quantity of air is initially at 200 kpa and 35 degree c. if the final state after a thermodynamic process is 120 kPa and 10 degree celcius, find the polytropic index of the process and describe what type of process this index represents

Q: Water is stored in a closed tank of capacity 0.1m. The quality of water is 60% and initial pressure…

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Q: We have refrigerant R-134a at a temperature of 30 C and a specific enthalpy of 127 kJ/kg. Find the…

A: According to the given data A refrigerant R-134a is at T= 30 C h=127 kJ/kg. we need to find The…

Q: a) ΔS (kJ/k), b) Heat transferred (kJ), c) ΔH (kJ), d) ΔU (kJ)

A: Given: m= 3 kg/min P1=30 bar T=350oC P2=7 bar Isothermal process To determine:  a) ΔS  b) Heat…

Q: the total energy change in this process is equal to zero

A: Since there is no change in kinetic and potential energy and internal energy is a function of…

Q: and point out the range

A: The plot of polytropic process on P-V and T-S diagram for endothermic, volume decrease, heating and…

Q: A quantity of ideal gas with an initial condition of 0.1 m3 and 735 kPa expands isothermally to 118…

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Q: 2-kg saturated liquid Refrigerant-134a at 0. 40 MPa undergoes the following: Process 1-2:…

A: Given data: - The mass of saturated liquid Refrigerant-134a is m = 2 kg. The pressure of saturated…

Q: An ideal gas enclosed in a 1.77ft3 rigid tank initially at 70°C and 0.93kg/cm2 . Find the…

A: Given data,  V1= 1.77 ft3 = V2 (volume of tank is going to be constant.)  T1= 70°C = 343 K  P1= 0.93…

Q: system (calculate quality if appr ure of the system. Show how pol for

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Q: If 4 lb of NH3 at 200 psia and 360°F are cooled at constant volume to t2 =100°F, find (a) p2, (b)…

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Q: An object follows Newton's law of Heating/Cooling. If the object cools from 101°C to 81°C after…

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Q: An ideal gas with a molecular mass of 31 is contained in an inflexible tank. It is heated from…

A: Given data :- Molecular mass=31 T1=256.79°C T2= 555.35 °C Change in internal energy = 184 kJ/kg

Q: 24. 1.6 kg/min of saturated steam at 2.86 mpa undergoes a p=c process until its temperature become…

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Q: Five kg of air at 100 kPa and 25oC are compressed according to the law PV1.3 = C until its pressure…

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Q: Solve the following questions using Steam Table: 1. Determine T, h, s, u and v of saturated steam…

A: Given conditions Condition 1 Pressure = 1.4 MPa With a superheat of 100oC   Condition 2 Pressure =…

Q: Q) Saturated (liquid+ vapor) ammonia at 60°C

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Q: Air is inside a piston-cylinder arrangement initially at a pressure of 1.2 bar, temperature of 77oC…

A: Given data:- Initial Pressure = 1.2 bar Initial Volume = 0.8 m^3 Initial Temperature = 77°C Find the…

Q: piston cylinder arrangement contains 0.11 kg of Nitrogen and recieves 11.78 kJ of heat isothermally.…

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Q: deal gas with a molecular man of 30 is contained in an inflexible tark. It is heated from 259.45 °C…

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Q: Steam at 2.6MPa, 400°C expand isothermally until its pressure becomes 4.36MPa. Det dH, dU, dS, dV,…

A: given; pressure(P1)=2.6MPa                         =2.6*103KPatemperature(T1)=4000c…

Q: A/ Find the missing properties: P (kpa) 320 u (KJ/kg) 0.5 Phase description Material T('C) X R-134…

A: We are suppose to solve only one question. Please post other question as a separate question.

Q: You have steam at 700°C with specific volume 0.230.  Calculate its specific enthalpy in KJ/kg.

A: Calculated specific enthalpy in KJ/kg.

Q: There are 1.5 kgm of gas for which R=0.377kJ/kg-K and k=1.3 that undergo an isometric process from…

A: To find: The change in enthalpy. Given: The value of gas constant is R=0.377 kJkg·K. The mass is…

Q: 025kg/s of Caton Dioxide (R 0.1889 kJ/kg-K, k 1.289) undergo a certain process in a close system…

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Q: nd the specific volume of steam at 90 psia and 650˚F using the ideal gas law. What is the percent…

A: (a) The pressure is  and temperature is (b) The pressure is  and temperature is .(c) The pressure is…

Q: Consider 0.5 kg of Refrigerant -134a contained in a piston-cylinder assembly with initial…

A: Given data:initial temperature =80°cpressure=7baradiabatic expansion=48°cpressure=2barso, from the…

Q: Thermodynamics. Please show the complete and step by step solution. Steam has a quality of 95% at a…

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Q: a. What is the mass of the gas in kg b. What is the mass of the piston in kg c. Calculate the volume…

A: PV=mRT m =PV/(RT) = (200 *1000*0.5)/(488.21* 408) = 0.502034 kg

Q: system contains liquid water. Energy i

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Q: 4.8 Saturated steam at 2 MPa is contained in a piston= cylinder arrangement as shown in the sketch.…

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Q: Steam undergoes an isentalpic (h=C) process from 1.5 MPa, 350°C to 10 MPa. Find the final…

A: Given: Initial pressure P1=1.5MPaInitial Temperature T1=350oCFinal pressure P2=10MPa

Q: V1 = 1.15

A: given: R = 188.96 J/kg-K  cp = 0.8452 KJ/kg-K m=5kg  v1= 1.15 m3  P1 =700 KPa

Q: Determine P (kPa) 400 the missing properties, show it on a P-V diagram. T (°C) u (kJ/kg) h (kJ/kg) X…

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Q: For adiabatic process, pressure before and after the process are 4000000 N/m? and 2 bar…

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Q: 0.25kg/s of Carbon Dioxide (R = 0.1889 kJ/kg-K, k = 1.289) undergo a certain process in a close…

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Q: Derive that AH = AU + W for the constant pressure process.

A: It is not possible to calculate the absolute value of Enthalpy. so we find the difference in the…

Q: new temperature scale called the N-scale is to be defined using the ice point, at 0°C as 50°N and…

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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.