Font size
WorksheetsUnit 1 Thermodynamics Quiz
Total questions: 23
Worksheet time: 6hrs 45mins
Amount of energy required to raise the temperature of a substance of 1 Kg mass by 10C is called
Specific entropy
Specific heat capacity
Sensible heat
Latent Heat
Which of the following is not a thermodynamical variable
Temperature
Volume
Entropy
height
If the temperature of the source is increased, the efficiency of carnot heat engine
Increases
Decreases
Remains constant
First increases then becomes constant
The distance travelled by an atom between two successive collisions is called
Wavelength
Displacement
Free path
Mean free path
In which thermodynamic process is there no flow of heat between the system and the surroundings.
Isobaric
Isothermic
Adiabatic
Isochoric
An open system
A.Is a specified region where transfers of energy and/or mass take place
B.Is a region of constant mass and only energy is allowed to cross the boundaries
C.Cannot transfer either energy or mass to or from the surroundings
D.Has a mass transfer across its boundaries, and the mass within the system is not necessarily constant
E.None of the above
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
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 thermodynamic process which occurs at constant pressure is
isothermal
Isochoric
Isomeric
Isobaric
dQ=dU+dW refers to which law of Thermodynamic?
(a)
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
The temperature of the system reduces in an
Adiabatic Compression
Isothermal Expansion
isothermal compression
adiabatic expansion
2.Internal energy depends on
Only pressure
Only Volume
Only Temperature
Only Mass
3. 1st Law of thermodynamics is the conservation of
Radiation energy
Heat energy
Electric energy
Magnetic energy
6. Area under P-V diagram gives
Heat
Internal energy
Work done
Temperature
Which of the following laws was expressed by Nernst?
The first law of thermodynamics
The second law of thermodynamics
The third law of thermodynamics
none of the above
What is thermodynamics?
study of the relationship between heat and other forms of energy
study of the conversion of chemical energy to other forms of energy
tudy of the relationship between mechanical energy to other forms of energy
study of the conversion of mechanical energy to other forms of energy
What is the value of the absolute thermodynamic temperature scale?
3K
0K
1K
4K
In which of the following systems does mass transfer occur across the system boundary?
isolated system
closed system
open system
none of the mentioned
The entropy of an isolated system can never ____
decrease
be zero
increase
When work is dissipated into internal energy, what is the change in the disorderly motion of molecules.
increases
remains the same
decreases
none of the mentioned
