Related Questions

The property of a working substance which increases or decreases as the heat is supplied or removed in a reversible manner, is known as
A Enthalpy
B Internal energy
C Entropy
D External energy
How are the efficiencies of any heat engine (miu) and reversible heat engine (miuR) compared, when both are operating between same heat source and same heat sink?
A miu = miuR
B miu>miuR
C miu
D none of these
Two men and women are entrusted with a task. The second man needs three hours more to cope up with the job than the second man and the woman would need working together. The first man, working alone, would need as much time as second man and the woman working together. The first man working alone, would spend eight hours less than the double period of the time second man would spend working alone. How much time would the two men and the women need to complete the task if they all asked together?
A 1 hour
B 2 hours
C 3 hours
D 4 hours
E 5 hours
For a thermodynamic process to be reversible, the temperature difference between hot body and working substance should be
A Zero
B Minimum
C Maximum
D Infinity
The expression for the work done for a reversible polytropic process can be used to obtain the expression for work done for all processes, except reversible __________ process.
A Isobaric
B Isothermal
C Adiabatic
D None of these
Chemical potential (an intensive property) of a substance is a force that drives the chemical system to equilibrium and is equal to its partial molar properties. The reatio of chemical potential to free energy of a pure substance at oconstant temperature and pressure is
A 0
B 1
C ∞
D None of these
A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as
A Allotropic change
B Recrystallization
C Heat treatment
D Precipitation
A reversible change in the atomic structure of steel with corresponding change in the properties is known as
A Molecular change
B Physical change
C Allotropic change
D Solidus change
Change in enthalpy in a closed system is equal to heat transferred if the reversible process takes place at constant
A Pressure
B Temperature
C Volume
D Internal energy
Change in internal energy in a closed system is equal to heat transferred if the reversible process takes place at constant
A Pressure
B Temperature
C Volume
D Internal energy

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