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What do you understand by the following ...

What do you understand by the following statements ?
enthalphy of formation of nitric oxide is +9.7 kJ.

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When 1 mole of NO(g) is formed from its elements `N_(2)(g)` and `O_(2)(g)`, 90.7kJ of heat absorbed.
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SUBHASH PUBLICATION-CHEMICAL THERMODYNAMICS-Two marks questions and answers :
  1. With example explain the term 'Heat of transition'.

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  2. Define heat (enthalpy) of transition.

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  3. What do you understand by the following statements ? enthalphy of fo...

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  4. What do you understand by the following statements ? enthalpy of com...

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  5. Give an example for the relation between Delta H and Delta U.

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  6. What are exothermic and endothermic chemical reactions?

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  7. State and explain the first law of thermochemistry.

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  8. Explain standard enthalpy of reaction.

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  9. Explain standard enthalpy of subslimation [Delta("sub")H^(@)).

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  10. Explain standard enthalpy of formation (Delta(f)H^(@)).

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  11. Explain standard enthalpy of combustion (Delta(c )H^(@)).

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  12. Explain bond dissociation enthalpy.

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  13. Justify the following statements : An exothermic reaction is alway...

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  14. Justify the following statements : The entropy of a substance incre...

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  15. Evaporation of water is an endothermic process but spontaneous. Explai...

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  16. Explain standard enthalpy of solution (Delta(sol)H^(@)).

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  17. At a certain temperature 'T', endothermic reaction A rarr B proceeds v...

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  18. Explain standard enthalpy of atomisation (Delta(s)H^(@))

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  19. Explain with the help of an example, the difference between bond disso...

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  20. What is meant by free energy of a system ? What will be the direction ...

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