Question
In: Mechanical Engineering
Prove that the adiabatic process of an ideal gas in a simple compressible closed system is...
Prove that the adiabatic process of an ideal gas in a simple compressible closed system is the polytropic process of n=k ( where k is the specific heat rate) by using the thermodynamic first law.
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Solutions
samet mamat answered 1 year agoRelated Solutions
N atoms of an ideal gas are contained in a cylinder with insulating (adiabatic) walls, closed...
N atoms of an ideal gas are contained in a cylinder with
insulating (adiabatic) walls, closed at one end by a piston.The
initial volume is Vi and the initial temperature is Ti. Find the
change in temperature, pressure and entropy that would occur if the
volume were suddenly increased to Vf by withdrawing the piston (Vf
> Vi).
N atoms of an ideal gas are contained in a cylinder with insulating (adiabatic) walls, closed...
N atoms of an ideal gas are contained in a cylinder with
insulating (adiabatic) walls, closed at one end by a piston.The
initial volume is Vi and the initial temperature is Ti . Find the
change in temperature, pressure and entropy that would occur if the
volume were suddenly increased to Vf by withdrawing the piston (Vf
> Vi).
The pressure of a monatomic ideal gas doubles during an adiabatic compression. What is the ratio...
The pressure of a monatomic ideal gas doubles during an
adiabatic compression. What is the ratio of the final volume to the
initial volume (Vf/Vi)?
What is the difference between isothermal and adiabatic? 300 cm3 of an ideal diatomic gas at...
What is the difference between isothermal and adiabatic? 300 cm3
of an ideal diatomic gas at a pressure of 1 atmosphere and a
temperature of 300 K (i.e. room temperature) is contained by a
cylinder with a piston top. A camshaft turns and drives the piston
further into the cylinder, reducing the volume to 100 cm3 .
(a) What is the final pressure if this compression takes place
isothermally? What is the final pressure and temperature if the
compression takes...
An ideal gas is taken through a complete cycle in three steps: adiabatic expansion with work...
An ideal gas is taken through a complete cycle in three steps:
adiabatic expansion with work equal to I25 J, isothermal
contraction at 325 K, and increase in pressure at constant
volume.
(a) Draw a p-V diagram for the three steps.
(b) How much energy is transferred as heat in step 3, and
(c) is it transferred to or from the gas?
choose the best answer: A- An ideal gas enters an adiabatic nozzle at 10 m/s and...
choose the best answer:
A-
An ideal gas enters an adiabatic nozzle at 10 m/s and exits at 300
m/s. If the incoming specific enthalpy of the gas is 2,111 kJ/kg,
what is the exiting specific enthalpy of the gas in
kJ/kg?
Choices: 1: 2021.1 Kj/Kg , 2: 2200.9 kj/Kg , 3: 92011 Kj/Kg ,
-2021.2 kj/Kg.
B- A material with a specific heat, Cp, of 5 kJ/kg-K passes
through an insulated turbine at 4 kg/s. The incoming temperature of...
Five kmol of oxygen (O2) gas undergoes a process in a closed system from p1 =...
Five kmol of oxygen (O2) gas undergoes a process in a closed
system from p1 = 50 bar, T1 = 170 K to p2 = 25 bar, T2 = 308 K.
Determine the change in volume, in m3.
During an adiabatic expansion of an ideal gas, which stays constant? a) U b) H c)...
During an adiabatic expansion of an ideal gas, which stays
constant?
a) U
b) H
c) S
Internal Energy stays constant?
Which one of the following is true?
a) The entropy of an isolated system can only stay constant or
increase during a process
b) We can construct a heat engine that extracts heat from a hot
reservoir and delivers an equal amount of work
c) We can construct a refrigerator whose sole effect is to
transfer heat from a...
Adiabatic process.
In an adiabatic expansion of a gas,what is the effect on its temperature :
An ideal gas is expanded from 5 bars to 1 bar through isentropic(reversible and adiabatic) operation...
An ideal gas is expanded from 5 bars to 1 bar through
isentropic(reversible and adiabatic) operation of a turbine. For
ambient conditions at 25°C and 1 bar, calculate the exergy of the
turbine when the gas inlet temperature to the turbine is:
I) above ambient conditions at 250°C (8marks)
ii) below ambient condition at -50°C (8marks)
iii) comment on your answer to I and ii above (4marks)
(Cp=1.0KJ/Kg.K , n=1.4)
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