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For the reaction 2H(g)rarr H(2)(g), the ...

For the reaction `2H(g)rarr H_(2)(g)`, the sign of `DeltaH` and `DeltaS` respectively are :

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Both `DeltaH and DeltaS` are negative. During the formation of H - H bond, heat is released and randomness decreases.
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ICSE-CHEMICAL THERMODYNAMICS -SHORT ANSWER TYPE QUESTIONS
  1. With the help of at least two examples show that randomness increases ...

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  2. What is entropy and in what units is it expressed ? Discuss the physic...

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  3. For the reaction 2H(g)rarr H(2)(g), the sign of DeltaH and DeltaS resp...

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  4. What happens to the entropy when a gas undergoes expansion ? Explain.

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  5. Is the entropy of the universe constant ?

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  6. State and explain the second law of thermodynamics. Mention the essent...

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  7. Show that the entropy changes in a reversible isothermal process is ze...

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  8. Show that the entropy change in an irreversible process is always posi...

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  9. Define 'entropy of fusion' and 'entropy of vapourisation and write exp...

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  10. State and explain the second law of thermodynamics.

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  11. Gibbs Free Energy

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  12. Derive the equation, DeltaG = DeltaH - T DeltaS.

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  13. Give 2 points of difference between molarity and molality.

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  14. What is the free energy criterion for a process to occur spontaneously...

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  15. For the process A+ B to C + D, DeltaG is positive. Comment on the spon...

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  16. What are spontaneous processes ? Mention the conditions for a reaction...

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  17. What is entropy ? State the effect of increased temperature on the ent...

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  18. State the thermodynamic conditions for spontaneous occurrence of a pro...

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  19. DeltaH and DeltaS are positive for a chemical reaction. Under what con...

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  20. What is meant by free energy of a substance ? How is it related to its...

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