Four kg of air is contained in a piston-cylinder assembly at 400 kPa and 28 °C. The piston carries a static load, including its own mass, of 5000 lbf, but is otherwise unconnected to an external system. The air is heated until the piston is thrice as high as it was initially. If the atmospheric pressure is 101 kPa, and the process is 92 percent efficient, how much work, in Btu, is done by the air?

Four kg of air is contained in a piston-cylinder assembly at 400 kPa and 28 °C. The piston carries a static load, including its own mass, of 5000 lbf, but is otherwise unconnected to an external system. The air is heated until the piston is thrice as high as it was initially. If the atmospheric pressure is 101 kPa, and the process is 92 percent efficient, how much work, in Btu, is done by the air?

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

Problem 1.1MA

See similar textbooks

Related questions

Q: during the process from the initial temperature of (30×1.6)°C down to the final temperature of 20°C.…

Q: A closed system undergoes an adiabatic process. During the process, the system operates at the same…

Q: Q2: Air in A frictionless piston-cylinder device is compressed slowly according to the relation…

Q: done during the process is

Q: Air enters a diffuser in order to decrease its pressure from 65 kPa to 45 kPa. At the inlet, its…

A: Given data: The inlet pressure of the air to the diffuser is p1 = 65 kPa. The outlet pressure of…

Q: Initially, a closed system consists of 2 lb of water vapor at the temperature and volume of 300°F…

A: Given data: mass of water m=2 lb Initial Temperature of water Ti =300o F Initial volume of water vi…

Q: A piston-cylinder assembly contains air at a temperature of 527°C and a volume of V1 = 2 m³. The air…

Q: A 10-ft' tank contains oxygen initially at 14.7 psia and 80°F. A paddle wheel within the tank is…

Q: A piston-cylindrical device contains 1 kg of air at a temperature of 300 K and a pressure of 100…

Q: Given the temperature and pressure of an ideal gas, how would you find the specific volume and…

Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 200 lb/in²…

Q: 5 kg air with initial temperature of 100°C expands at a constant pressure of 2 bar to reach to a…

Q: A 10-kg steel container (cp = cv = 0.46 kJ/(kg K)) is cured at 500 °C. After coming out of the oven,…

Q: A substance of mass 3.4 kg is inside a piston-cylinder assembly with an initial volume of 0.31 m3,…

A: Given data: m=3.4 kgV1=0.31 m3P=2.4 barT1=52°CV2=0.82 m3 Need to determine the work transfer.

Q: Determine the initial and final temperatures, in °F, and the work for the process, in Btu.

A: Given: P=300 lbf/in2 V2=7.28 ft3 m=2 lbs To determine the initial and final temperatures, in °F,…

Q: The procedure to inflate a hot-air balloon requires a fan to move an initial amount of air into the…

Q: A Piston-cylinder system initially contains R-134a refrigerant at 2.8 bar and 40BC temperature, and…

Q: certain quantity of gas with an initial condition of 14 bar, 0.08 m3, and 450 K expands at constant…

A: Given Data State 1: 14 bar, 0.08 m3 and 450 K State 2: 0.25 m3, 14 bar

Q: Air is polytropically compressed in a cylinder according to PV1.3 = C. The work required is 190kJ.…

A: Given, Polytropic index = n = 1.3 Work = W = 190 kJ We know that for air, Ratio of specific heats…

Q: For an ideal gas if the specific internal energy at a specific pressure and temperature of 20 oC is…

A: Temperature = 20 degree Celsius P2 = 2P1 Specific internal energy = 246.9 kJ/kg

Q: In a steam engine the pressure and volume of steam satisfy the equation PV1.4 = k, where k is a…

Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 250 lbf/in²…

A: Givenm=2lbsP=250lbf/in2 at saturated vapourV=7.08 ft3

Q: An adiabatic air compressor compresses 15 L/s of air at 1 bar and 30 °C to 8 bar and 350 °C. A heat…

Q: Three hundred kilojoules of heat is added in a piston cylinder arrangement containing air causing it…

A: Polytropic heat addition and work done relation is used.

Q: A piston-cylinder device initially contains CO2 at 200 kPa and 400°C and the total enclosed volume…

Q: If the steam undergoes a process under Pv1.141 = C, and the work steady flow is found to be 451.99…

Q: Air with a pressure of 2 MPa and a temperature of 250 C (0.5 kg of PV^ 1.25 = expands while…

Q: Air with cv = 0.723 KJ/Kgm - °R is compressed in a piston-cylinder machine according to pV1.3 = c…

Q: Consider a piston-cylinder assembly containing 10.0 kg of water. Initially, the gas has a pressure…

Q: A piston-cylinder device initially contains air at 150 kPa and 27°C. At this state, the piston is…

A: To know the behavior of gases on various conditions, various assumptions are made because, in real…

Q: Air enters the cylinder of a 4-stroke gasoline engine at 33°C and 101.2 kPa. Engine clearance is…

A: Given data, P1 = 101.2 kPa T1 = 33°C =306K Vc =10.5% of V Q input = 2600 kJ/kg

Q: 0.5 kg of air with a pressure of 2 MPa and a temperature of 250 °C expands while satisfying the…

Q: Two lbs of water vapor in a piston-cylinder assembly expands at a constant pressure of 200 lb/in²…

Q: If the steam undergoes a process under Pv1.243 = C, and the work steady flow is found to be 343.99…

Q: For an ideal gas if the specific internal energy at a specific pressure and temperature of 20 °C is…

A: For an ideal gas, internal energy is a function of temperature only.

Concept explainers

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.

Question

100%

Four kg of air is contained in a
piston-cylinder assembly at 400
kPa and 28 °C. The piston
carries a static load, including
its own mass, of 5000 lbf, but is
otherwise unconnected to an
external system. The air is
heated until the piston is thrice
as high as it was initially. If the
atmospheric pressure is 101
kPa, and the process is 92
percent efficient, how much
work, in Btu, is done by the air?

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 2 steps with 2 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.

Similar questions

9. An auditorium which is 5m wide by 15m long and a ceiling of 3m. The initial air is maintained by air conditioning units at 101.3kPa and 22°C. At some point the air conditioning unit stopped its operation and the pressure & temperature becomes 105.0773 kPa & 33°C. Assuming the auditorium is empty. Determine the following: a. The mass of air inside, in kg b. Change in Internal Energy, in kJ c. Heat gained by the air, in kJ
A cylinder with a moveable piston holds 0.48 lbm of hydrogen initially with a volume of 1.49 ft^3 temperature of 1281 °F. Then the volume is expanded to 3 ft^3 while the gas pressure remains contant. Determine the work in BTU.
A gas with specific volume v₁ = 1 m³/Kg and pressure p₁=1bar in a closed system undergoes a thermodynamic cycle which consists of the following three separate processes: 1->2: Isobaric compression to v₂-0.25 m³/Kg 2->3: Isometric heating. 3->1: Isothermal expansion (pV = constant) to the initial volume. Calculate the specific work produced by the gas per cycle. Present your answer in kJ/kg.
A 2 kg of steam occupying 0.3 m at 15 bar is expanded according to the law pvl3 = constant to a pressure of %3D 1.5 bar. The work done during the expansion will be
A piston-cylinder device initially contains CO2 at 200 kPa and 400°C and the total enclosed volume is 300 litres. Due to heat loss, the piston moves downwards to a position where it sits on a pair of stoppers and its final enclosed volume is 150 litres. Further heat loss leads to the pressure being reduced to 160kPa. Workout 1) the final temperature, 2) the total work done by CO2 and 3) the total heat transferred to CO2. Also make some comments on the result of heat and create a schematic p-v diagram of the process. The following assumptions are to be made: CO2 is a perfect gas and its molecular mass is 44kg/kmol. The ratio of specific heat capacities, γ (gamma) is 1.3 The volume occupied by the stoppers is to be ignored. There is no leakage in the system There is no friction between the cylinder and piston walls and the piston moved slowly at the same speed therefore, no acceleration. For the conversion from Celsius to Kelvin, use 273 Use 8314.5 J/kmol.K for the universal gas…
I need the answer at 20 minute
Thermodynamics A Piston-Cylinder system initially contains R-134a refrigerant at a temperature of 2.8 bar and 40 C, and its initial volume is 0.1 m3. First, heat is transferred to the system by keeping the piston constant and this process is continued until the pressure is 3.2 bar. the process is maintained by allowing the volume to change. At the end of this process, the temperature reaches 50C. Assuming the state changes as if balanced, calculate the following: a)He amount of heat transferred during constant pressure operation b)Show the state changes on the P-v diagram.