Question
In: Mechanical Engineering
Refrigerant 22 undergoes a constant-pressure process within a piston–cylinder assembly from saturated vapor at 5.0 bar...
Refrigerant 22 undergoes a constant-pressure process within a
piston–cylinder assembly from saturated vapor at 5.0 bar to a final
temperature of 25°C. Kinetic and potential energy effects are
negligible.
Evaluate the work and the heat transfer, each in kJ per kg of
refrigerant.
Solutions
samet mamat answered 2 years agoRelated Solutions
Air undergoes a polytropic process in a piston–cylinder assembly from p1 = 1 bar, T1 =...
Air undergoes a polytropic process in a piston–cylinder assembly
from p1 = 1 bar, T1 = 295 K to p2 = 7 bar. The air is modeled as an
ideal gas and kinetic and potential energy effects are negligible.
For a polytropic exponent of 1.4, determine the work and heat
transfer, each in kJ per kg of air, (1) assuming constant cv
evaluated at 300 K. (2) assuming variable specific heats.
Air undergoes a polytropic process in a piston–cylinder assembly from p1 = 1 bar, T1 =...
Air undergoes a polytropic process in a piston–cylinder assembly
from p1 = 1 bar, T1 = 295 K
to p2 = 3 bar. The air is modeled as an ideal
gas and kinetic and potential energy effects are negligible.
For a polytropic exponent of 1.2, determine the work and heat
transfer, each in kJ per kg of air,
(1) assuming constant cv evaluated at 300
K.
(2) assuming variable specific heats.
Air undergoes a polytropic process in a piston–cylinder assembly from p1 = 1 bar, T1 =...
Air undergoes a polytropic process in a piston–cylinder assembly
from p1 = 1 bar, T1 = 295 K to p2 = 3 bar. The air is modeled as an
ideal gas and kinetic and potential energy effects are negligible.
For a polytropic exponent of 1.6, determine the work and heat
transfer, each in kJ per kg of air, (1) assuming constant cv
evaluated at 300 K. (2) assuming variable specific heats.
A gas in a piston–cylinder assembly undergoes a compression process for which the relation between pressure...
A gas in a piston–cylinder assembly undergoes a compression
process for which the relation between pressure and volume is given
by pVn = constant. The initial volume
is 0.2 m3, the final volume is 0.04 m3, and
the final pressure is 2 bar.
For n = 1.3, determine the initial pressure, in bar, and
the work for the process, in kJ.
Refrigerant 134a, initially (state 1) a saturated liquid at -80C, is contained in a piston-cylinder assembly....
Refrigerant 134a, initially (state 1) a saturated liquid at
-80C, is contained in a piston-cylinder assembly. The water
undergoes a process to the corresponding saturated vapor (state 2),
during which the piston moves freely in the cylinder. The change of
state is brought about by heating the water as it undergoes an
internally reversible process at constant pressure and temperature.
If the mass of the refrigerant is 0.1 kg, determine (a) heat
transfer using first law of thermodynamics in kJ...
Carbon monoxide gas (CO) contained within a piston– cylinder assembly undergoes three processes in series: Process...
Carbon monoxide gas (CO) contained within a piston– cylinder
assembly undergoes three processes in series:
Process 1–2: Expansion from p1 = 4.5 bar, V1
= 0.8 m3 to V2 = 1.4 m3, during
which the pressure-volume relationship is pV = constant.
Process 2–3: Constant-volume heating from state 2 to state 3, where
p3 = 4.5 bar.
Process 3–1: Constant-pressure compression to the initial
state.
Evaluate the overall work, in kJ and graph
Refrigerant 134a in a cylinder-piston assembly is at 240 kPa with a quality 15% and then...
Refrigerant 134a in a cylinder-piston assembly is at 240 kPa with a quality 15% and then as a result of heat added the quality increases to 45%, what is the change in volume per one unit of mass (m3/kg)? The piston is assumed to move freely but it is sealed tight that does not allow mass exchange.
An Insulated piston cylinder device contains 4 L of saturated liquid water at a constant pressure...
An Insulated piston cylinder device contains 4 L of saturated
liquid water at a constant pressure of 150 K PA. water is stirred
by a paddle wheel while a current of 9 A flows for one hour through
a resistor placed in the water. if 80% of the liquid is vaporized
doing this constant pressure process and the paddle does 400 kJ of
work during this time. determine the resistance of the
resistor?
The propane is contained in a piston-cylinder assembly, which maintains constant pressure at 0.2 MPa. If...
The propane is contained in a piston-cylinder assembly, which
maintains constant pressure at 0.2 MPa. If a mixture with a quality
of 0.65 and a total volume of 0.07 m3 is slowly heated to a
temperature of 54°C, a) what was the total work into the system b)
what was the total amount of heat added to the system.
Please explain what tables you use to find the answer.
The propane is contained in a piston-cylinder assembly, which maintains constant pressure at 0.2 MPa. If...
The propane is contained in a piston-cylinder assembly, which
maintains constant pressure at 0.2 MPa. If a mixture with a quality
of 0.65 and a total volume of 0.07 m3 is slowly heated to a
temperature of 54°C.
a) what was the total work into the system.
b) what was the total amount of heat added to the system.
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