The density of helium is 0.178 kg/m3 at STP. What is the density in kg/m3 at 25°C and 98 kPa? A steel tank initially contains oxygen gas at 450 kPag and 20°C. After 2.5 kg of oxygen had been used, the pressure and temperature of the gas in the tank was found to be 180 kPag and 20°C, respectively. What was the initial mass of oxygen in the tank in kg? A 1500-L tank contains nitrogen at a pressure of 400 kPag and a temperature of 320K. Later, because of a leak, it was found that the gage pressure has dropped to 320 kPag and the temperature has decreased to 300K, determine the amount of nitrogen that has leaked out in kg.

Q: 1. An ideal gas at a pressure of 4120 kPaa and a temperature of 25 °C is contained in a cylinder…

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Q: A cylinder fitted with a piston contains oxygen has an innitial volume of 0.2 m and pressure 200 kpa…

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Q: Balloon planes are filled with 5,000 moles of helium. The initial helium state is 101.325 kPa and…

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Q: 8. How much steam at 120 °C is needed to change 1 kg of ice at -10 °C to water at 10°C?

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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: Determine the h, s and °SH of steam at 0.5 MPa and 520°C using Mollier Chart.

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Q: Saturated liquid water at 5 bar is heated until it is superheated steam at 30 bar and 650ºC.  What…

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Q: Required information A piston-cylinder device contains 0.66 kg of steam at 300°C and 0.5 MPa. Steam…

A: Given Data Mass of the steam, m=0.66KgAt state 1P1=0.5MPaT1=300°C Steam is superheated At constant…

Q: An isolated cylinder contains saturated water at 200oC. The cylinder initial volume was 25 L. The…

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Q: What is the final pressure in psia?

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Q: The temperature before and after the adiabatic process is 200 K and 127°C. The pressure before the…

A: Given data:

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: Using data from previous problem, if O.05 kg of gas leaks out of the tank and in the process the…

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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: An ideal gas follows the relationship pV=10 where V is in m3 and p is in kPaa. Draw the pV diagram…

A: NOTE: Even after applying the correct concept my answer is not coming to be equal to any of the…

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

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Q: In what class of material is stress whitening often seen, and what is the physical origin of the…

A: The phenomenon of stress whitening is generally observed in amorphous solids. However, it may also…

Q: The tank contains 2kg of water at 20C, 1 atm. The tank is heated. When the tank pressure reaches…

A: Write the given data. m1=2 kgT1=20 °CP1=1 atmP2=300 kPa

Q: If 10 kg of ice at 0C is added to 2 kg of steam at 100C, the temperature of resulting mixture is

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Q: work against the piston. How much work is done during the process? How much error would be made by…

A: To determine the work done in the process and percentage error in the steam behaviour in ideal…

Q: A tank of compressed air is at 40°C and 10 atm. 1 third of the gas is removed for inflating a car…

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Q: For the situations below briefly explain how you obtained the values and provide the numerical…

A: It is required to determine properties for given process

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: the initial mass (m1) in (kg) :is A rigid 0.15 m³ tank contains air at 0.8 MPa, 200°C. A valve on…

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Q: Q1: A piston-cylinder device contains 1 kg of nitrogen at 100 kPa and 25°C. the nitrogen is heated…

A: givenmass of nitrogen m=1kgpressure P=100Kpatemperature T=25oC=298Kafter constant pressue…

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: 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: 4. A rigid tank initially contains 5kg of saturated vapor steam at 150°C. Heat transfer is done…

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Q: At what maximum pressure must a be in order to contain water vapor at 10°C? system

A: Giventemperature of the water vapour is 10oC

Q: An ideal gas follows the relationship pv-10 where V is in m' and p is in kPaa. Draw the pV diagram…

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Q: Required information A piston-cylinder device contains 0.66 kg of steam at 300°C and 0.5 MPa. Steam…

A: Write the given values with the suitable variables.Here, m, T, and P are the mass, temperature, and…

Q: Assume 20 lbm of an ideal gas with R=50 ft-lb/lb-R and k=1.18 are heated from 75 to 200F. What is…

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Q: 0.75 Ibm of oxygen is initially at 30 psi and 50°F. The oxygen expands in an isobaric process until…

A: Given data: Mass of Oxygen, m=0.75 lbInitial pressure, P1=30 psiInitial temperature, T1=50°FFinal…

Q: A conduit connects two receptacle of different size. A valve is used at each end which can be opened…

A: Given for first receptable vessel Pressure Pa = 4200 KPaTemperature Ta  = 82o C =82+273 K =355…

Q: The system contains carbon dioxide at 300 kPa, with volume of 0.2 m³ and is at 100°C. The mass has…

A: Given:-Initial pressure, P1=300 kPaInitial volume, V1=0.2 m3Initial temperature, T1=100°C=373KFinal…

Q: Two kilogram of gas is confined in a 1m³ tank at 200 kpa and 88°C. What type of gas is in the tank?

A: Given data: m=2 kgV=1 m3P=200 kPaT=88°C=361 K Need to determine the type of gas in the tank.

Q: The saturation table for refrigerant-134a lists the following at -40°C: P= 51.25 kPa, hfg=225.86…

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Q: 2. An unknown gas (with PVT conditions of; 101 kPa, 2.83 m & 23°C) is to be transferred into a…

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Q: An ideal gas expands from 11.5 cu.ft to 17.5 cu.ft at 85 deg.F and 15.5 psia. During the isobaric…

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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.