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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

Constant

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The correct Answer is:
D
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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 :

ALLEN-THERMODYNAMICS -EXERCISE -2
  1. In which of the following cases entropy decreases?

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  2. Which of the following state function is not zero at standard state :-

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  3. Entropy change for an adiabatic reversible process is

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  4. A gas is allowed to expand reversibly under adiabatic conditions. What...

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  5. For a reaction at 25^(@)C enthalpy change (Delta H) and entropy change...

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  6. The spontaneous nature of a reaction is impossible if :

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  7. At a certain temperature T, the endothermic reaction A rarr B proceeds...

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  8. If Delta H gt 0 and Delta S gt 0, the reaction proceeds spontaneously ...

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  9. The temperature at which the reaction : Ag(2)O(s)rarr 2Ag(s)+1//2O(2)(...

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  10. The enthalpy change for a given reaction at 298 K is -x cal mol^(-1). ...

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  11. Which of the following is true fo the reacion H(2)O(l)hArr H(2)O(g) at...

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  12. For the reaction Ag(2)O(s)rarr 2Ag(s)+1//2O(2)(g) the value of Delta H...

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  13. For hypothetical reversible reaction 1//2A(2)(g) +3//2B(2)(g) rarr A...

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  14. For the precipitation of AgCl by Ag^(+) ions and HCl

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  15. What is the sign of Delta G for the process of ice melting at 283 K ?

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  16. What is the free energy change, 'DeltaG' When 1.0 mole of water at 100...

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  17. A reaction A +B rarr C+D +q is found to have a positive entropy change...

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  18. Equilibrium constant of a reaction is elated to :

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  19. The Vant Hoff equation is :

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  20. If Delta G^(@)gt 0 for a reaction then :

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