NEW
Font size
WorksheetsThermodynamics
Total questions: 15
Worksheet time: 8mins
Which law of thermodynamics is used to understand the concept of energy conservation?
Zeroth law
First law
Second law
None of these
In which thermodynamic process is there no flow of heat between the system and the surroundings.
Isobaric
Isothermic
Adiabatic
Isochoric
If the temperature of the source is increased, the efficiency of carnot heat engine
Increases
Decreases
Remains constant
First increases then becomes constant
An ideal heat engine operates in Carnot's cycle between 227 degree C and 127 C. it absorbs 6 x 10 ^4 J at high temperature. The amount of heat converted into work is
4.8 x 10^4 J
3.5 x 10^4 J
1.6 x 10^4 J
1.2 x 10^4 J
What is the source temperature of the Carnot engine in K required to get 70% efficiency? Given sink temperature is 27 degree C.
1000 K
90 K
270 K
727 K
110 Joule of heat is added to a gaseous system, whose internal energy is 40 J.
Then the amount of external work done is
150 J
70 J
110 J
40 J
The efficiency of carnot heat engine
1+(Temperature of sink/Temperature of source)
1-(Temperature of sink/Temperature of source)
1+(Temperature of source/Temperature of sink)
1+(Temperature of source/Temperature of sink)
The second law of thermodynamics introduces the concept of
Heat
Temperature
Entropy
Internal energy of the system
In thermodynamics, which is not a state variable
Density
Internal Energy
Enthalpy
Heat
Heat does not spontaneously flow from a colder body to a hotter one. Which of the following thermodynamics law states this?
Zeroth law of thermodynamics
First law of thermodynamics
Second law of thermodynamics
Third law of thermodynamics
Which of the following occurs without a change in the internal energy?
Isochoric process
Isenthalpic process
Steady-state process
Isobaric process
Heat flow into a system is ____, and heat flow out of the system is ________
Positive, positive
Positive, Negative
Negative, positive
Negative, Negative
Which of the following is true for a discharging tank?
the process is quasi-static
the process is adiabatic
dQ=0
all of the mentioned
Which of the following is true according to Clausius statement?
it is possible to construct a device that can transfer heat from a cooler body to a hotter body without any effect
it is impossible to construct a device that can transfer heat from a cooler body to a hotter body without any effect
it is impossible to construct a device that can transfer heat from a hotter body to a cooler body without any effect
none of the mentioned
The entropy of an isolated system can never ____
Decrease
Be zero
Increase
None of the mentioned
