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Recent questions tagged the second law of thermodynamics
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Calculate the change in entropy and heat transfer through cylinder walls, if 0.4m^3 of a gas at a pressure
asked
Apr 4, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
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vote
0
answers
Define entropy.
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Apr 2, 2019
in
Class 11
by
kratos
thermodynamics
the second law of thermodynamics
class-11
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vote
1
answer
Explain Clausius inequality.
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Mar 29, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
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1
answer
Write down the expression for thermal efficiency of heat engine and coefficient of performance (COP) of the heat pump and refrigerator.
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Mar 25, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
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1
answer
Define entropy and show that it is a property of system.
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Mar 24, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
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vote
1
answer
A room is heated with a 1500 W electric heater. How much power can be saved if a heat pump with a COP of 2.0
asked
Mar 22, 2019
in
Class 9
by
kratos
cbse
work and energy
thermodynamics
class-9
the second law of thermodynamics
rates or fluxes of entropy
+3
votes
1
answer
For a reversible process at equilibrium, the entropy change can be expressed as :
asked
Mar 21, 2019
in
Class 11
by
kratos
thermodynamics
the second law of thermodynamics
class-11
+2
votes
1
answer
A reversible heat engine operates between temperature 800°C and 500°C of thermal reservoir.
asked
Mar 14, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
+2
votes
1
answer
What is clausius clapeyron equation and derive it
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Mar 11, 2019
in
Physics
by
kratos
clausius
class-11
jee
thermodynamics
the second law of thermodynamics
statistical physics
entropy
jee mains
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vote
1
answer
The maximum efficiency of a heat engine that operates between temperatures of 1500 K in
asked
Mar 6, 2019
in
Class 11
by
kratos
thermodynamics
the second law of thermodynamics
class-11
heat transfer
+3
votes
1
answer
Explain briefly the working principle of a refrigerator and obtain an expression for its coefficient of performance.
asked
Mar 4, 2019
in
Class 11
by
kratos
thermodynamics
the second law of thermodynamics
class-11
+2
votes
1
answer
If the efficiency of a power plant goes up as the low temperature drops why not let the heat rejection go to a refrigerator
asked
Mar 4, 2019
in
Class 11
by
kratos
carnot cycles
thermodynamics
the second law of thermodynamics
class-11
+3
votes
1
answer
A heat engine operates between 200 K and 100 K. In each cycle it takes 100 J from the hot reservoir,
asked
Feb 21, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
+3
votes
1
answer
A car engine operates with a thermal efficiency of 35%. Assume the airconditioner has a coefficient of performance
asked
Feb 17, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
heat transfer
+2
votes
1
answer
One kg of adiatomic gas is at a pressure of 5 × 10^5 (N / m^2) The density of the gas is {(5kg) / m^3}
asked
Feb 17, 2019
in
Class 11
by
kratos
class-11
the first law of thermodynamics
thermodynamics
cbse
the second law of thermodynamics
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1
answer
An ideal gas expands into a vacuum in a rigid vessel. As a result there is:
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Jan 28, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
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votes
1
answer
Consider the following processes: The temperature of two identical gases are increased from the same initial temperature
asked
Jan 25, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
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vote
1
answer
What do you mean by cyclic and quasi – static process.
asked
Jan 22, 2019
in
JEE
by
kratos
class-11
jee
thermodynamics
the second law of thermodynamics
jee mains
heat and thermodynamics
kinetic theory of gases
+2
votes
1
answer
A heat engine takes in 200 J of thermal energy and performs 50 J of work in each cycle. What is its efficiency?
asked
Jan 20, 2019
in
Class 12
by
kratos
thermodynamics
the second law of thermodynamics
neet
aiims
+2
votes
1
answer
A reversible heat engine operates between two reservoirs at temperature of 600°C and 40°C.
asked
Jan 17, 2019
in
Mathematics
by
kratos
thermodynamics
the second law of thermodynamics
basic thermodynamics
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