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Entropy change for an adiabatic reversib...

Entropy change for an adiabatic reversible process is

A

positive

B

zero

C

negative

D

infinite

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The correct Answer is:
B
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Calculate the total entropy change for the following reversible processes: a. Isothermal b. Adiabatic

Entropy is a measure of randomess of system. When a liquid is converted to the vapour state entropy of the system increases. Entropy in the phase transformation is calculated using Delta S = (Delta H)/(T) but in reversible adiabatic process Delta S will be zero. The rise in temperature in isobaric or isochoric process increases the randomness of system, which is given by Delta S = "2.303 n C log"((T_(2))/(T_(1))) C = C_(P) or C_(V) Entropy change in a reversible adiabatic process is

Which of the following expression for entropy change of an irreversible process ?

The thermodynamic property that measures the extent of molecular disorder is called entropy. Entropy change of phase transformation can be calculated using Trouton's formula (DeltaS = DeltaH//T) . In the reversible adiabatic process, however, DeltaS will be zero. the rise in temperature in isobaric and isochoric conditions is found to increase the randomness or entropy of the system. DeltaS = 2.303 C log (T_(1)//T_(2)) The entropy change in an adiabatic process is

Entropy change in reversible adiabatic process is:

Consider the following statements: I. Change in enthalpy is always smaller than change in internal energy. II. The variation in enthalpy of a reaction with temperature is given by Kirchhoff's equation. III. The entropy change in reversible adiabatic process is equal to zero. Select the correct answer.

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 :

RC MUKHERJEE-MISCELLANEOUS OBJECTIVE QUESTIONS-MCQ
  1. Two moles of an ideal monoatomic gas are allowed to expand adiabatical...

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  2. The work required to raise a mass of 0.5 kg through a height of 1 m is

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  3. Entropy change for an adiabatic reversible process is

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  4. Three engines A, B and C take steam at 130^(@)C and reject it at 20^(@...

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  5. One mole of an ideal gas is expanded isothermally from 1 dm^(3) to 10 ...

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  6. Which of the following relations gives the mathematical expression for...

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  7. For the expression: dG = Vdp - SdT, which of the following is correct?

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  8. Which of the following will increase with the increase in temperature?

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  9. One mole of an ideal gas expands reversibly and isothermally at 300 K ...

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  10. The equilibrium constant for the reaction A+BhArrC+D is 10. DeltaG...

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  11. For the reaction 3Br(2)+6OH^(-)-5Br^(-)+BrO(3)+3H(2)O Equivalent w...

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  12. The equivalent weight of Cu(2)S (mol. Wt. = M) in the following reacti...

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  13. The equivalent weight of HNO(3) (molecular weight =63) in the followin...

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  14. The equivalent weight of H(2)SO(4) in the following reaction is Na(2...

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  15. The largest diagonal in a cubic crystal of edge length a is

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  16. The decreasing order of density of different crystals is

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  17. The empty space left between the spheres in close-packed structure is ...

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  18. One unit cell of NaCl contains

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  19. In a close-packed structure, if r is the radius of the spherical void ...

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  20. A reaction A+BtoD+E takes place as A+Boverset(k(1))to2C C+Boverset...

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