. Dry air at 25 °C and 1 bar are to be liquefied. The air is isothermally compressed to 180 bar. Assume 75% air of the total air compressed is passed through the expander. The temperature of the air entering the expander is – 70 °C while the temperature of the air leaving the expander is – 140 °C. The make-up air is supplied at 30 °C and 1 bar. Find the yield of liquid air in lb per lb of air compressed and the temperature of the air before throttling.

Q: One mole of a monoatomic perfect gas is allowed to expand adiabatically and reversibly from a…

A: Given:Gas is mono-atomic and considered as perfect gasNumber of mole = n = 1For mono-atomic gases,…

Q: Instructions: Show your entire solution. Indicate which table from the steam tables you utilized in…

A:

Q: Outside air at 30 C drybulb &  25 C wetbulb temperature flowing at a rate of  25,000 liters/min is…

A:

Q: One-quarter Ibmol of oxygen gas (O2) undergoes a process from p1 = 20 lb/in?, T1 = 500°R to p2 = 150…

A:

Q: An ideal gas at 27°C expands isothermally and reversibly from 10 to 1 bar against a pressure that is…

A: We need to calculate change in enthalpy (dH)

Q: A gas mixture has a molar composition of 18% methane, 34% butane and the remainder is ethane. The…

A:

Q: H.W.) A 10 g of steam initially at 120 °C is mixed with 50 g of ice at -10 °C. What will be the…

A:

Q: A monoatomic ideal gas undergoes the following four step process (B) star5ng at Point A (400 kPa ,…

A:

Q: 04:9 x 104 cm³3 of water vapor is in equilibrium with the same amount of liquid phase at 8 MPa.…

A: Given data, Volume of water vapor is Vg=9×104 cm3Vg=9×104×10-6Vg=0.09 m3 Pressure of the mixture, P…

Q: 2. In the engine of a car that uses petrol as fuel, when the piston is at its highest position, air…

A: Given:P1=10 barT1=100°CT2=1500°C

Q: Find the total heat in kJ required for ice at -15°C to become vapor at 120°C.

A: As per the guidelines we will answer the first question for you, for the second question kindly…

Q: A 100 kgh mixture of benzene (B) and toluene (T) containing 50% benzene by mass is separated by…

A: According to the information we have a 100 kg/h fixture of benzene,toluene which containing 50 % of…

Q: Air is compressed in a compressor through the purely polytropic, purely isothermal, and intercooling…

A: The process that is purely polytropic is 1-X-2" Answer: C. 1-X-2"

Q: 2.016 kg/s of hydrogen gas at 298 K ente

A: mass flow rate of  hydrogen gas = 2.016 kg/ s  It is actually heat created be fission which turns…

Q: Steam at 20.4 bar is throttled to 2 bar and the temperature after throttling is found to be 175°C.…

A: Given data as per question state 1p1=20.4 barstate 2p2=2 barT2=1750CThrottlying h1=h2considering…

Q: Assume that P(s) indicates paralysis in the equation given below and that U(s) is the percentage of…

A: Given: PsUs=7.63×10-2s2+1.15s+0.28 To find: Damping ratio and natural frequency Percentage…

Q: What is the change in entropy when 120 g of superheated methanol gas at 1.00 bar and 110.0 °C is…

A: The number of mole-

Q: A sample of 2.00 mol of helium is expanded at constant temperature of 273.15 K from 5.0 L to 20.0 L…

A:

Q: Pure water is to be compressed from 1 bar, 20°C. (a) If the compression is done adiabatically to 100…

A:

Q: A batch of hot tea (2.00 kg at 95°C) is thrown into a large pond, which has a temperature of 15°C…

A:

Q: Define “entropy” and discuss some of its implications

A: Given data To define the entropy and it's implications.

Q: 28.5 m'/m of room air at 25.5 °C DBT and 50 % RH is mixed with 28.5 m'/m of outside air at 38.5 °C…

A: Given: vi=28.5 m3/mTi=25.5 °C DBTRH=50%v0=28.5 m3/mT0=38.5 DBT & 27°C WBT

Q: Q3) Two kg of CO2 at 50 °C and 2.0 bar are mixed with five kg of N2 at 200 °C and 1.5 bar to form a…

A:

Q: Example A gas mixture has the following composition by volume: 20% N, 30% CO,, 50% CH. Other data:…

A:

Q: Steam is expanded isentropic ally in the high pressure cylinder of a steam turbine from a pressure…

A:

Q: A piston contains 320 moles of an ideal monatomic gas that initally has a pressure of 2.38 x 10° Pa…

A: A quasi-static process (also known as a quasi-equilibrium process; from the Latin quasi, meaning 'as…

Q: Nm 2. An ideal gas has a gas constant of 319.8 and a gas ratio of 1.26. Calculate kg K the heat…

A:

Q: A pipe with a valve connects two vessels A&B of different sizes. Vessel A contains 142L of air at…

A:

Q: 1. The number of moles, the pressures and the temperatures of gases a, b and c are given as follows:…

A: Given data:

Q: D. How many Btu need to be added to change 5 lb of ice at 30°F to steam at 215°F? Refer to tables…

A:

Q: 14.0.3 m³ of gas at 15°C and I bar is compressed adiabatically to 7 bar. Calculate: 1. mass of the…

A:

Q: EXAMPLE 5 In an oil refinery, a storage tank contains 2000 gal of gasoline that ini- tially has 100…

A: Given Data: Total amount gasoline =2000 gal Amount of additive dissolved in gasoline initially…

Q: 11.0 kg of methane is found to have a pressure of 3000 kPa when it's temperature is at 400K. Compute…

A: As methane table is not available in the textbook so i have used EES calculator to fetch the…

Q: A rigid container, perfectly insulated against heat, is divided into two compartments by a curtain.…

A: Solution:

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.