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Evaporation of water is an endothermic p...

Evaporation of water is an endothermic process but spontaneous. Explain.

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It is because entropy increases during this process as water vapour has more entropy than liquid water. `Delta G` become -ve because `T Delta S gt Delta H`.
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SUBHASH PUBLICATION-CHEMICAL THERMODYNAMICS-Two marks questions and answers :
  1. Justify the following statements : An exothermic reaction is alway...

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

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

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

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

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

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

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

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  9. Why most of the exothermic process (reaction) are spontaneous ?

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  10. The enthalpy of combustion of sulphur is 297 kJ. Write the thermochemi...

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  11. What is the most important condition for a process to be reversible in...

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  12. Why the absolute value of enthalpy cannot be determined ?

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  13. What are the applications of Hess's Law of constant heat summation?

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  14. Explain standard enthalpy of dilution.

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  15. Define Molar enthalpy of fusion.

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  16. Define Molar enthalpy of vapourisation ?

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  17. Define : (a) Enthalpy of atomization (b) Lactic enthalpy.

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  18. Explain Laplace-Lavoisier law.

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  19. If the enthalpy of combustion of diamond and graphite are -395.4kJ mol...

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  20. H(2)(g) + (1)/(2)O(2)(g) rarr H(2)O(g) Delta H = -242 kJ mol^(-1). Bon...

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