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Which of the following statements is cor...

Which of the following statements is correct for any thermodynamic system?

A

The internal energy changes in all processes

B

Internal energy and entropy are state functions

C

The change in entropy can never be zero

D

The work done in an adiabatic process is always zero

Text Solution

Verified by Experts

The correct Answer is:
B
Internal energy and entropy are state functions and not path functions.
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ALLEN-GEOMETRICAL OPTICS-EXERCISE - 05 (A)
  1. Out of the parameters-temperature, pressure, work and volume, which pa...

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  2. A Carnot engine takes 3xx10^6cal. of heat from a reservoir at 627^@C, ...

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  3. Which of the following statements is correct for any thermodynamic sys...

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  4. Two thermally insulated vessels (1) and (2) are filled with air at tem...

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  5. Which of the following is incorrect regarding the first law of thermod...

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  6. The temperature-entropy diagram of a reversible engine cycle is given ...

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  7. A system goes from A and B via two processes. I and II as shown in fig...

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  8. Two rigid boxes containing different ideal gases are placed on a table...

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  9. The work done in compressing 1 kg-mol of a gas adiabatically is 146 kJ...

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  10. A Connot engine having an efficiency of (1)/(10) as heat engine, is u...

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  11. When a system is taken from state i to state f along the path iaf, it ...

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  12. Two moles of helium gas are taken over the cycle ABCDA , as shown in t...

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  13. Two moles of helium gas are taken over the cycle ABCDA , as shown in t...

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  14. Two moles of helium gas are taken over the cycle ABCDA , as shown in t...

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  15. A diatomic ideal gas is used in a Car engine as the working substance ...

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  16. A thermally insulted vessel contains an ideal gas of molecular mass M ...

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  17. A Carnot engine operating between temperatures T(1) and T(2) has effic...

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  18. Helium gas goes through a cycle ABCDA (consisting of two isochoric and...

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  19. A Carnot engine, whose efficiency is 40%, takes in heat from a source ...

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  20. The above p-v diagram represents the thermodynamic cycle of an engine,...

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