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In which of the following processes all ...

In which of the following processes all three thermodynamic variables, that is pressure volume and temperature can change

A

Isobaric

B

Isothermal process

C

Isochoric

D

Adiabatic

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The correct Answer is:
D
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Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. The unit of entropy in S-I system is -

Entropy ( S ) is a thermodynamic variable like pressure P , volume V and temperature T . Entropy of a thermodynamic system is a measure of disorder of molecular motion. Greater is disorder , greater is entropy. Change in entropy of a thermodynamic system is the ratio of heat supplied to absolute temperature.In an adiabatic reversible process, entropy remains constant while in any irreversible process entropy increases. In nature the processes are irreversible , therefore entropy of universe is continuoulsy increasing. When milk is heated , its entropy :

NARAYNA-KINETIC THEORY OF GASES-C.U.Q
  1. An isothermal process is a

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  2. Two sample A and B of a gas initially at the same pressure and tempera...

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  3. In which of the following processes all three thermodynamic variables,...

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  4. During adiabatic expansion the increase in volume is associated with

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  5. A gas is being compressed adiabatically. The specific heat of the gas ...

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  6. The gas equation PV//T = constant is true for a constant mass of an id...

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  7. During adiabatic compression of a gas, its temperature

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  8. The work done on the system in an aidabatic compression depends on

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  9. The ratio of slopes of adiabatic and isothermal curves is

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  10. Two steam engines 'A' and 'B', have their sources respectively at 700K...

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  11. If the temperature of the sinkis decreased, then the efficiency of hea...

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  12. An ideal heat engine can be 100% efficient if its sink is at

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  13. If the temperature of a source increases, then the efficiency of a hea...

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  14. When heat is added to a system then the following is not possible?

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  15. A sink, that is a system where heat is rejected, is essential for the ...

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  16. The efficiency of a Carnot heat engine

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  17. An ideal heat engine working between temperature T(H) and T(L) has eff...

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  18. The efficiency of the reversible heat engine is eta(r) and that of irr...

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  19. In a heat engine, the temperature of the working substance at the end ...

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  20. The adiabatic and isothermal elasticities B(phi) and B(theta) are rela...

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