Login
Login
Register
Questions
Unanswered
Tags
Categories
Ask a Question
Ask a Question
Recent questions tagged boundary work
+2
votes
1
answer
Consider the problem of inflating the helium balloon, as described a control volume that consists of the helium inside the balloon
asked
Apr 5, 2019
in
Mathematics
by
kratos
thermodynamics
boundary work
+2
votes
1
answer
A 12 kg steel container has 0.2 kg superheated water vapor at 1000 kPa, both at 200°C. The total mass is now cooled to ambient temperature
asked
Apr 3, 2019
in
Mathematics
by
kratos
entropy of a liquid or a solid
thermodynamics
boundary work
+3
votes
1
answer
Air in a spring loaded piston/cylinder has a pressure that is linear with volume, P = A + BV. With an initial state of P = 150 kPa, V = 1 L
asked
Mar 19, 2019
in
Mathematics
by
kratos
thermodynamics
boundary work
+1
vote
1
answer
A piston/cylinder contains 1 kg water at 20°C with volume 0.1 m^3. By mistake someone locks the piston preventing it from moving
asked
Mar 15, 2019
in
Mathematics
by
kratos
boundary work
thermodynamics
energy equation
+3
votes
1
answer
A car air-conditioning unit has a 0.5-kg aluminum storage cylinder that is sealed with a valve and it contains 2 L of refrigerant R-134a at 500 kPa
asked
Mar 10, 2019
in
Mathematics
by
kratos
thermodynamics
irreversibility
boundary work
+1
vote
1
answer
A piston cylinder contains air at 600 kPa, 290 K and a volume of 0.01 m^3. A constant pressure process gives 54 kJ
asked
Feb 24, 2019
in
Mathematics
by
kratos
thermodynamics
boundary work
energy equation
+2
votes
1
answer
Helium is used for inflating aeroplane tyres & filling balloons for metrological observations.Why?
asked
Feb 14, 2019
in
Class 12
by
kratos
cbse
the p block elements
class-11
hydrogen
thermodynamics
class-12
boundary work
states of matter
+2
votes
1
answer
A piston/cylinder with constant loading of piston contains 1 L water at 400 kPa, quality 15%. It has some stops mounted so the maximum possible
asked
Feb 8, 2019
in
Mathematics
by
kratos
compressibility factor
thermodynamics
rates or fluxes of entropy
entropy of a liquid or a solid
boundary work
+3
votes
1
answer
A piston/cylinder assembly contains 1 kg of liquid water at 20°C and 300 kPa. There is a linear spring mounted on
asked
Jan 29, 2019
in
Mathematics
by
kratos
thermodynamics
boundary work
energy equation
+3
votes
1
answer
Saturated vapor water at 150°C is expanded to a lower pressure with constant temperature. Find the changes in u and *
asked
Jan 12, 2019
in
Mathematics
by
kratos
availability
phase diagrams
thermodynamics
critical points
boundary work
+2
votes
1
answer
12 kg mole of a gas occupies a volume of 603.1 m^3 at temperature of 140°C while its
asked
Dec 28, 2018
in
Class 11
by
kratos
thermodynamics
class-11
boundary work
units and measurements
+1
vote
1
answer
A piston cylinder loaded so it gives constant pressure has 0.75 kg saturated vapor water at 200 kPa. It is now cooled so the volume becomes
asked
Dec 26, 2018
in
Mathematics
by
kratos
entropy generation
thermodynamics
boundary work
+1
vote
1
answer
A cylinder has 0.1 kg air at 25°C, 200 kPa with a 5 kg piston on top. A valve at the bottom is opened to let the air out and the piston
asked
Dec 22, 2018
in
Mathematics
by
kratos
transient processes
compressibility factor
phase diagrams
entropy of ideal gases
thermodynamics
critical points
boundary work
+2
votes
1
answer
A work of 2.5 kJ must be delivered on a rod from a pneumatic piston/cylinder where the air pressure is limited to 500 kPa.
asked
Dec 20, 2018
in
Mathematics
by
kratos
thermodynamics
polytropic processes
boundary work
energy equation
+2
votes
1
answer
A piston/cylinder has 5 m of liquid 20°C water on top of the piston (m = 0) with cross-sectional area of 0.1 m^2 . Air is let in under the piston
asked
Dec 9, 2018
in
Mathematics
by
kratos
thermodynamics
boundary work
+1
vote
1
answer
P = A +BV^-1, where p is the pressure and V is volume.Then what are the dimensions of the constant B?
asked
Nov 20, 2018
in
Class 11
by
kratos
thermodynamics
class-11
boundary work
units and measurements
+2
votes
1
answer
Find the volume of 2 kg of ethylene at 270 K, 2500 kPa using Z
asked
Oct 27, 2018
in
JEE
by
kratos
polytropic process
fluid mechanics
jee
entropy of ideal gases
thermodynamics
jee mains
device efficiency
boundary work
+3
votes
1
answer
A piston/cylinder assembly contains 2 kg of liquid water at 20°C, 100 kPa and it is now heated to 300°C by a source at 500°C. A pressure
asked
Oct 20, 2018
in
Mathematics
by
kratos
entropy generation
energy equation
thermodynamics
entropy of a liquid or a solid
boundary work
+2
votes
1
answer
Saturated water vapor at 200 kPa is in a constant pressure piston cylinder. At this state the piston is 0.1 m from the cylinder bottom
asked
Oct 17, 2018
in
Mathematics
by
kratos
thermodynamics
boundary work
+2
votes
1
answer
A piston, mp= 5 kg, is fitted in a cylinder, A = 15 cm^2, that contains a gas. The setup is in a centrifuge that creates
asked
Oct 15, 2018
in
Mathematics
by
kratos
energy
thermodynamics
density
force
boundary work
To see more, click for the
full list of questions
or
popular tags
.