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Which of the following are the values of...

Which of the following are the values of electron affinities in kJ/mol for the formation of `O^(-) and O^(2-)` from O ? 

A

`-142, -702`

B

`–141, 702`

C

`142, 702`

D

`-142, -142`

Text Solution

Verified by Experts

The correct Answer is:
B
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Compute the heat of formation of liquid methyl alcohol in kilojoules per mole, using the following data. Heat of vapourisation of liquid methyl alcohol =38 kJ/mol. Heat of formation of gaseous atoms from the elements in their standard states , H= 218kJ/mol, C= 715kJ/mol, O= 249 kJ/mol. Average bond energies :C-H =415kJ/mol, C-O=365 kJ/mol, O-H = 463 kJ/mol.

Compute the heat of formation of liquid methyl alcohol in kilojoules per mole, using the following data. Heat of vapourisation of liquid methyl alcohol= 38 kJ/mol. Heat of formation of gaseous atoms from the elements in their standard states, H= 218kJ/mol, C= 715 kJ/mol, O= 249 kJ/mol. Average bond energies, C-H = 415 kJ/mol, C-O = 365 kJ/mol, O-H= 463 kJ/mol