Home
Class 12
CHEMISTRY
Formation of F^(-) is exothermic but fo...

Formation of `F^(-)` is exothermic but formation of `O2^(-)` is endothermic. Explain in two or three sentences.

Text Solution

Verified by Experts

Formation of `F^(-)` is exothermic because incoming electron experiences force of attraction due to the nucleus of F atom. Formation of `O^(2-)` is a two step process
`O(g)+e to O^(-)(g)" "(triangle_(eg) H)_(1)=-EA_(1)`
`O^(-)(g) +e^(-) to O^(2-) (g)" "(triangle_(eq) H)_(2)=+EA_(2)`
The first one is exothermic while the second one is endothermic as energy is required to overcome the force of repulsion and `|triangle_(eg) H)(1)| lt |(triangle_(eg) H)_(2)|`
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion: Formation of Cl^(-) ion is exothermic wheres O^(2-) ion formation is endothermic. Reason: EA_(2) of oxygen is endothermic and greater than its exothermic EA_(1) value of oxygen.

Assertion: Formation of Cl^(-) ion is exothermic wheres O^(2-) ion formation is endothermic. Reason: EA_(2) of oxygen is endothermic and greater than its exothermic EA_(1) value of oxygen.

Combination of two AO s lead to the formation of .

Why MgO exist as Mg^(2+)O^(2-) not as Mg^(o+)O^(ɵ) whereas the formation of Mg^(2+) from Mg requires more energy than formation of Mg^(o+) and formation of O^(ɵ) from O is exothermic whereas the formation of O^(2-) is endothermic .

Illustrate the formation of H_3O^(+)

Explain the formation of ATP.

Explain the formation of C_2 H_2 molecule.

Assertion: The formation of F_((g))^(-) from F_((g)) is exothermic, whereas that of O_((g))^(2-) from O_((g)) is endotherrmic. Reason: The addition of second electron to a monovalent anion is difficult because both have the same charge and experience more repulsion.

Explain the formation of a chemical bond.

Is formation of ozone from oxygen an endothermic or exothermic reaction?