A. heat can’t be transferred from low temperature source to high temperature source
B. heat can be transferred for low temperature to high temperature source by using refrigeration cycle.
C. heat can be transferred from low temperature to high temperature source if COP of process is more than unity
D. heat can’t be transferred from low temperature to high temperature source without the aid of external energy
E. all of the above
Related Mcqs:
- First law of thermodynamics___________________?
A. enables to determine change in internal energy of the system
B. does not help to predict whether the system will or not undergo a change
C. does not enable to determine change in entropy
D. provides relationship between heat, work and internal energy
E. all of the above - The first law of thermodynamics is the law of_________________?
A. conservation of mass
B. conservation of energy
C. conservation of momentum
D. conservation of heat
E. conservation of temperature - According to Dalton’s law, the total pres sure of the mixture of gases is equal to________________?
A. greater of the partial pressures of all
B. average of the partial pressures of all
C. sum of the partial pressures of all
D. sum of the partial pressures of all divided by average molecular weight
E. atmospheric pressure - According to which law, all perfect gases change in volume by l/273th of their original volume at 0°C for every 1°C change in temperature when pressure remains constant ____________________?
A. Joule’s law
B. Boyle’s law
C. Regnault’s law
D. Gay-Lussac law
E. Charles’ law - According to first law of thermodynamics_______________________?
A. mass and energy are mutually convertible
B. Carnot engine is most efficient
C. heat and work are mutually convertible
D. mass and light are mutually convertible
E. heat flows from hot substance to cold substance - According to first law of thermodynamics__________________?
A. work done by a system is equal to heat transferred by the system
B. total internal energy of a system during a process remains constant
C. internal energy, enthalpy and entropy during a process remain constant
D. total energy of a system remains constant
E. entropy of a system remains constant - According to Avogadro’s law, for a given pressure and temperature, each molecule of a gas_________________?
A. occupies volume proportional to its molecular weight
B. occupies volume proportional to its specific weight
C. occupies volume inversely proportional to its molecular weight
D. occupies volume inversely proportional to its specific weight
E. occupies same volume - According to Gay-Lussac law for a perfect gas, the absolute pressure of given mass varies directly as____________________?
A. temperature
B. absolute
C. absolute temperature, if volume is kept constant
D. volume, if temperature is kept constant
E. remains constant,if volume and temperature are kept constant - Boyle’s law i.e. pV = constant is applicable to gases under ___________________?
A. all ranges of pressures
B. only small range of pressures
C. high range of pressures
D. steady change of pressures
E. atmospheric conditions - Which law states that the specific heat of a gas remains constant at all temperatures and pressures______________________?
A. Charles’ Law
B. Joule’s Law
C. Regnault’s Law
D. Boyle’s Law
E. there is no such law
