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In water, the first and second O-H bond ...

In water, the first and second O-H bond disociation enthalies are 502 and 427 kJ `mol^(-1)` respectively. Determine the value of bond enthalpy of O-H bond.

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Bond enthalpy of water is given by the average of bond dissociation enthalpies of the two O-H bonds.
`therefore`bond enthalpy`=(502+427)/(2)=464.5jK*mol^(-1)`
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CHHAYA PUBLICATION-CHEMICAL BONDING AND MOLECULAR STRUCTURE-WARM UP EXERCISE
  1. What do you understand by (i) bond length, (ii) bond dissociation enth...

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  2. Arrange the following compounds in increasing order of carbon-carbon ...

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  3. In water, the first and second O-H bond disociation enthalies are 502 ...

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  4. Arrange the given compounds in order of their increasing bond length: ...

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  5. Why does the value of bond angle increase with increase in electronega...

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  6. In which of the following molecules/ions all the bonds are not equal ?

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  7. Bond angles in PB r(3)(101.5^(@)),(PB l(3)(100^(@)) and PF(3)(97^(@)) ...

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  8. Bond angle in H(2)O is greater than that of H(2)S- explain.

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  9. Arrange the following in order of increasing radii. F, Cl, Br

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  10. Arrange the following molecules/ions in order of decreasing H-N-H bond...

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  11. Write down the main postulates of valence bond theory.

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  12. What do you understand by the term atomic orbital?

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  13. Explain why covalent bonds possess directional property.

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  14. What do you meann by a sigma and pi-bond?

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  15. Why are the pi-bonds weaker and more reactive than the sigma-bonds?

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  16. Arrange (s-s), (s-p) and (p-p) sigma-bonds in order of decreasing bond...

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  17. Explain why the formation of a pi-bond is not possible between a p(y) ...

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  18. Which symmetry element is present in a pi-bond?

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  19. What is meant by hybridisation of atomic orbitals?

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  20. What will be the spatial distribution of (i) sp^(3), (ii) sp^(2) a...

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