Question
In: Mechanical Engineering
The following problem description applies also to the next two problems. A piston-cylinder device contains 2...
The following problem description applies also to the next two problems.
A piston-cylinder device contains 2 kg of a saturated liquid mixture at an initial state 1 with p1= 100 kPa and x1= 0.8. The water is heated at constant pressure until its final state 2 with volume V2 = 1.947V1.
Its initial volume, in m3/kg, is closer to:
A) 3.836
B) 1.294
C) 2.990
D) 2.345
E) 2.156
F) 2.711
G) 4.625
H)1.736
B) Its final temperature, in oC, is closer to:
C) The amount of heat supplied to the steam during the expansion process, in kJ, is closer to:
Solutions
samet mamat answered 1 year agoRelated Solutions
The following problem description applies also to the next two problems. A piston-cylinder device contains 2...
The following problem description applies also to the next two
problems.
A piston-cylinder device contains 2 kg
of a saturated liquid mixture at an initial state 1 with
p1= 100 kPa and
x1= 0.8. The water is heated
at constant pressure until its final state 2 with
volume V2 =
1.947V1.
Its initial volume, in m3/kg, is closer to:
2.990
3.836
2.711
4.625
2.345
1.736
2.156
1.294
Its final temperature, in oC, is closer to:
268
167
300
142
280...
The following problem description applies also to the next two problems. A piston-cylinder device contains 2...
The following problem description applies also to the next two
problems.
A piston-cylinder device contains 2 kg
of a saturated liquid mixture at an initial state 1 with
p1= 100 kPa and
x1= 0.8. The water is heated
at constant pressure until its final state 2 with
volume V2 =
1.947V1.
Its initial volume, in m3/kg, is closer to:
Its final temperature, in oC, is closer to:
The amount of heat supplied to the steam during the expansion
process, in...
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doubles.
a) Determine the work done by the air and b) the total heat
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10°C. Determine (a) the final pressure, (b) the change in the
volume of the cylinder, and (c) the change in the enthalpy of the
refrigerant-134a.
A piston–cylinder device initially contains 2 kg water in 1 m3 at 500 kPa. The system...
A piston–cylinder device initially contains 2 kg water in 1 m3
at 500 kPa. The system then cools down and the volume drops to half
and pressure of 300 kPa. At this state, the piston is resting on a
set of stops, and the mass of the piston is such that a pressure of
500 kPa is required to move it. (a) Show the process on a P-v, T-v
and P-T diagrams with respect to saturation lines and determine,
(b)...
A piston-cylinder device contains a saturated mixture of steam and water having a total mass of...
A piston-cylinder device contains a saturated mixture of steam
and water having a total mass of 0.5 kg at a pressure of 160 kPa
and an initial volume of 100 liters. Heat is then added and the
fluid expands at constant pressure until it reaches a saturated
vapor state.
a) Draw a diagram representing the process showing the initial
and final states of the system.
b) Sketch this process on a P-v diagram with respect to the
saturation lines, critical...
A piston–cylinder device contains steam that undergoes a reversible thermodynamic cycle. Initially the steam is at...
A piston–cylinder device contains steam that undergoes a
reversible thermodynamic cycle. Initially the steam is at 400 kPa
and 350oC with a volume of 0.3 m3. The steam is first expanded
isothermally to 150 kPa, then compressed adiabatically to the
initial pressure, and finally compressed at the constant pressure
to the initial state. Determine (a) the net work and heat transfer
for the cycle after you calculate the work and heat interaction for
each process and (b) show the cyclic...
A piston-cylinder device initially contains 75 g of saturated water vapor at 310 kPa . A...
A piston-cylinder device initially contains 75 g of saturated
water vapor at 310 kPa . A resistance heater is operated within the
cylinder with a current of 0.4 A from a 200 Vsource until the
volume doubles. At the same time a heat loss of 2 kJ occurs.
a.Determine the final temperature
(T2).
b. Determine the duration of the process.
c. What-if scenario: What is the final temperature if the
piston-cylinder device initially contains saturated liquid
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A piston-cylinder device initially contains 0.3 m3 of nitrogen gas at 350 kPa and 35 ℃.
A piston-cylinder device initially contains 0.3 m3 of nitrogen gas at 350 kPa and 35 ℃. An electric heater within the device is turned on and is allowed to pass a 240W for 6 minutes. Nitrogen expands at constant pressure, and a heat loss of 3000 J occurs during the process. Determine the final temperature of the nitrogen. (Average CP for Nitrogen is 1.039 kJ/kgK and molecular weight of Nitrogen is 28.01 kg/kmol.)
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?
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